Add retry to "create namespace" part of installation

[ayalash]

A deployment's installation failed on HyperError: channel closed during “create namespace”.
The namespace wasn’t created and all attempts to setting the deployment version afterward were marked as upgrade and not installation, so the namespace was not created for them as well.

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      13: _start
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      12: __libc_start_main
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      11: main
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                 at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/std/src/rt.rs:148:20
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          std::rt::lang_start_internal
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                 at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/std/src/panic.rs:137:14
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          std::panic::catch_unwind
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                 at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/std/src/panicking.rs:447:19
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          std::panicking::try
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                 at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/std/src/panicking.rs:483:40
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          std::panicking::try::do_call
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                 at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/std/src/rt.rs:148:48
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          std::rt::lang_start_internal::{{closure}}
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                 at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/std/src/panic.rs:137:14
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          std::panic::catch_unwind
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                 at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/std/src/panicking.rs:447:19
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          std::panicking::try
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                 at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/std/src/panicking.rs:483:40
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          std::panicking::try::do_call
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                 at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/core/src/ops/function.rs:606:13
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      10: core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once
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                 at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/std/src/rt.rs:166:18
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       9: std::rt::lang_start::{{closure}}
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                 at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/std/src/sys_common/backtrace.rs:121:18
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          std::sys_common::backtrace::__rust_begin_short_backtrace
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                 at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/core/src/ops/function.rs:507:5
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       8: core::ops::function::FnOnce::call_once
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                 at /build/k8s-agent/src/main.rs:42:5
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          platz_k8s_agent::main
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                 at /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.24.2/src/runtime/runtime.rs:284:45
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       7: tokio::runtime::runtime::Runtime::block_on
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                 at /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.24.2/src/runtime/scheduler/multi_thread/mod.rs:66:9
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          tokio::runtime::scheduler::multi_thread::MultiThread::block_on
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                 at /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.24.2/src/runtime/context.rs:315:13
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       6: tokio::runtime::context::BlockingRegionGuard::block_on
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                 at /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.24.2/src/runtime/park.rs:283:31
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          tokio::runtime::park::CachedParkThread::block_on
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                 at /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.24.2/src/runtime/coop.rs:68:5
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          tokio::runtime::coop::budget
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                 at /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.24.2/src/runtime/coop.rs:102:5
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          tokio::runtime::coop::with_budget
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                 at /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.24.2/src/runtime/park.rs:283:63
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          tokio::runtime::park::CachedParkThread::block_on::{{closure}}
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                 at /build/k8s-agent/src/main.rs:42:12
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          platz_k8s_agent::main::{{closure}}
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                 at /build/k8s-agent/src/main.rs:13:5
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          platz_k8s_agent::_main::{{closure}}
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                 at /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.24.2/src/future/poll_fn.rs:58:9
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       5: <tokio::future::poll_fn::PollFn<F> as core::future::future::Future>::poll
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                 at /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/tokio-1.24.2/src/macros/select.rs:517:49
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          platz_k8s_agent::_main::{{closure}}::{{closure}}
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                 at /build/k8s-agent/src/task_runner/mod.rs:50:36
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       4: platz_k8s_agent::task_runner::start::{{closure}}
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                 at /build/k8s-agent/src/task_runner/mod.rs:71:25
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          platz_k8s_agent::task_runner::run_pending_tasks::{{closure}}
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                 at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/core/src/future/future.rs:124:9
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       3: <core::pin::Pin<P> as core::future::future::Future>::poll
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                 at /build/k8s-agent/src/task_runner/runnable_task.rs:20:91
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          <platz_db::schema::deployment_task::DeploymentTask as platz_k8s_agent::task_runner::runnable_task::RunnableDeploymentTask>::run::{{closure}}
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                 at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/core/src/future/future.rs:124:9
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       2: <core::pin::Pin<P> as core::future::future::Future>::poll
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                 at /build/k8s-agent/src/task_runner/install_and_upgrade.rs:23:85
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       1: platz_k8s_agent::task_runner::install_and_upgrade::<impl platz_k8s_agent::task_runner::runnable_task::RunnableDeploymentOperation for platz_db::schema::deployment_task::DeploymentInstallTask>::run::{{closure}}
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                 at /build/k8s-agent/src/task_runner/install_and_upgrade.rs:149:5
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          platz_k8s_agent::task_runner::install_and_upgrade::create_namespace::{{closure}}
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                 at /rustc/d5a82bbd26e1ad8b7401f6a718a9c57c96905483/library/core/src/result.rs:2108:27
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       0: <core::result::Result<T,F> as core::ops::try_trait::FromResidual<core::result::Result<core::convert::Infallible,E>>>::from_residual
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    Stack backtrace:
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        channel closed
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    Caused by:
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