cleanup: Builders directory cleanup

[gauron99]

separate the builders into their respective directories buildpacks s2i and oci (already exists) leaving builders for common code.
This PR is also a setup for the new upcoming scaffolding changes

[knative-prow]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: gauron99

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• OWNERS [gauron99]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 54.55%. Comparing base (7f7e476) to head (539540b).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3261      +/-   ##
==========================================
+ Coverage   54.52%   54.55%   +0.02%     
==========================================
  Files         162      162              
  Lines       19216    19216              
==========================================
+ Hits        10478    10483       +5     
+ Misses       7694     7689       -5     
  Partials     1044     1044              

Flag	Coverage Δ
e2e	39.68% <100.00%> (ø)
e2e go	35.61% <100.00%> (ø)
e2e node	30.98% <100.00%> (ø)
e2e python	35.34% <0.00%> (+0.08%)	⬆️
e2e quarkus	31.14% <100.00%> (ø)
e2e rust	30.58% <100.00%> (+0.01%)	⬆️
e2e springboot	30.61% <100.00%> (ø)
e2e typescript	31.10% <100.00%> (ø)
integration	17.88% <0.00%> (-0.05%)	⬇️
unit macos-14	44.33% <100.00%> (ø)
unit macos-latest	44.33% <100.00%> (ø)
unit ubuntu-24.04-arm	44.51% <100.00%> (-0.02%)	⬇️
unit ubuntu-latest	45.25% <100.00%> (-0.02%)	⬇️
unit windows-latest	44.35% <100.00%> (ø)

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[matejvasek]

/lgtm