deps(test): update dependency kubernetesclient to v18

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
KubernetesClient	17.0.14 -> 18.0.5

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Release Notes

kubernetes-client/csharp (KubernetesClient)

v18.0.5

What's Changed

• revert change to structs from classes for IntOrString and ResourceQuantity, and handle null values in YAML converters by @​tg123 in #​1673

Full Changelog: kubernetes-client/csharp@v18.0.4...v18.0.5

v18.0.4

What's Changed

• feat: add example for creating and resizing a Kubernetes pod by @​tg123 in #​1655
• fix docfx by @​tg123 in #​1656
• fix(yaml): byte[] serialization by @​IvanJosipovic in #​1657
• Bump actions/setup-dotnet from 4 to 5 by @​dependabot[bot] in #​1658
• refactor: reorganize Kubernetes client models into separate files by @​tg123 in #​1663
• generate base on 1.34 by @​tg123 in #​1654
• migrate to record by @​tg123 in #​1665
• Bump github/codeql-action from 3 to 4 by @​dependabot[bot] in #​1669
• feat: enhance Kubernetes client with watch functionality by @​lqlive in #​1667

Full Changelog: kubernetes-client/csharp@v17.0.14...v18.0.4

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