Run TestInt_PrivateGitRepository from temp directory

[intojhanurag]

fix: #3196

This PR updates TestInt_PrivateGitRepository to run from a temporary working
directory instead of directly using pkg/builders/testdata. The previous behavior
created a .s2i directory inside testdata during execution, causing unwanted
repository changes.

The test now copies the function source into a temporary directory before
running, consistent with other integration tests.

[knative-prow]

Hi @intojhanurag. Thanks for your PR.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 51.81%. Comparing base (b039190) to head (8c24d5d).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3214   +/-   ##
=======================================
  Coverage   51.81%   51.81%           
=======================================
  Files         162      162           
  Lines       19131    19131           
=======================================
  Hits         9912     9912           
  Misses       8241     8241           
  Partials      978      978           

Flag	Coverage Δ
integration	17.88% <ø> (ø)
unit macos-14	44.37% <ø> (ø)
unit macos-latest	44.37% <ø> (ø)
unit ubuntu-24.04-arm	44.56% <ø> (ø)
unit ubuntu-latest	45.31% <ø> (ø)
unit windows-latest	44.39% <ø> (ø)

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[intojhanurag]

Hey @lkingland , Is this good to go ? Can you review , if you have a moment.

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: intojhanurag, lkingland

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[lkingland]

Thanks for the fix!

Looks good; just need to resolve the merge conflict to use the new test's name (all Integration tests now need to begin with TestInt_) and should be ready to merge

[intojhanurag]

Hey @gauron99 , It is ready now . pLease take a look 😀

[gauron99]

/lgtm