[release-1.27] Add support for pinning tool versions to minor releases (#1421)

[FilipB]

• Add support for pinning tool versions to minor releases

• Add PIN_MINOR flag to only update patch versions while keeping major.minor the same
• Add TOOLS_ONLY flag to skip Istio updates and only update tools
• Remove kube-rbac-proxy update as it's no longer needed

🤖 Generated with Claude Code

• Make the linter happy

• Fix regex for getLatestMinorVersion and rename it to make better sense

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What type of PR is this?

• Enhancement / New Feature
• Bug Fix
• Refactor
• Optimization
• Test
• Documentation Update

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes #

Related Issue/PR #

Additional information:

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.66%. Comparing base (6ca5881) to head (2feb001).
⚠️ Report is 1 commits behind head on release-1.27.

Additional details and impacted files

@@               Coverage Diff                @@
##           release-1.27    #1429      +/-   ##
================================================
- Coverage         81.05%   80.66%   -0.40%     
================================================
  Files                44       44              
  Lines              2291     2291              
================================================
- Hits               1857     1848       -9     
- Misses              319      325       +6     
- Partials            115      118       +3     

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[FilipB]

/retest