chore(tekton): use hub resolver for git-clone stepaction

[chmouel]

📝 Description of the Change

Replace the vendored git-clone StepAction (.tekton/stepactions/git-clone.yaml) with a reference to the upstream tektoncd catalog via the hub resolver. The local copy was a verbatim duplicate of catalog version 0.2 — no reason to carry it.

Also fixes error wrapping in DetectPacInstallation (%s + .Error() → %w) to preserve the error chain for errors.Is/errors.As.

🔗 Linked GitHub Issue

Fixes #

🧪 Testing Strategy

• Unit tests
• Integration tests
• End-to-end tests
• Manual testing
• Not Applicable

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[gemini-code-assist]

Code Review

This pull request updates several Tekton pipeline configurations to use the hub resolver instead of the http resolver for the git-clone stepaction, referencing version 0.2 from the tektoncd catalog. It also removes a local git-clone stepaction definition file and improves error handling in bootstrap.go by wrapping the error with %w instead of formatting it as a string with %s. There are no review comments, so I have no feedback to provide.

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 59.67%. Comparing base (bd262aa) to head (dbb1812).
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Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2758   +/-   ##
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  Coverage   59.67%   59.67%           
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  Files         210      210           
  Lines       21007    21007           
=======================================
  Hits        12536    12536           
  Misses       7685     7685           
  Partials      786      786           

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