feat: Collect validating and mutating webhook configurations

[dlipovetsky]

Description, Motivation and Context

Collects validating and mutating webhook configurations as part of the cluster resources collector.

Fixes #1972

Checklist

• New and existing tests pass locally with introduced changes.
• Tests for the changes have been added (for bug fixes / features)
• The commit message(s) are informative and highlight any breaking changes
• Any documentation required has been added/updated. For changes to https://troubleshoot.sh/ create a PR here

Does this PR introduce a breaking change?

• Yes
• No

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

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