Auto merge of #57213 - matthiaskrgr:clippy_submodule_upd, r=oli-obk

submodules: update clippy from f7bdf50 to 39bd844

Fixes clippy toolstate

Changes:
````
UI test cleanup: Extract iter_skip_next from methods.rs
Update test output after rebase
Remove false negatives from known problems
Implement use_self for tuple structs
Document known problems
rustup #56225
Remove unnecessary `use` statements after `cargo fix`
Apply cargo fix --edition-idioms fixes
Use match ergonomics for booleans lint
Use match ergonomics for block_in_if_condition lint
Use match ergonomics for bit_mask lint
Use match ergonomics for attrs lint
Use match ergonomics for assign_ops lint
Use match ergonomics for artithmetic lint
Use match ergonomics for approx_const lint
Remove crate:: prefixes from crate paths
Support array indexing expressions in unused write to a constant
Mark writes to constants as side-effect-less
Update README local run command to remove syspath
Remove unsafe from consts clippy lints
Fix formatting
Merge new_without_default_derive into new_without_default
Only print out question_mark lint when it actually triggered
Add failing test
Reinserted commata
Recomend `.as_ref()?` in certain situations
Deduplicate some code?
````
r? @oli-obk or anyone else

Author: bors