fix: Cleanup space on our CI Github actions

[gauron99]

• remove useless directories in GH actions to save space to help with flakiness of tests failing with no space left on device

[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]

@gauron99: The label(s) kind/<kind> cannot be applied, because the repository doesn't have them.

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Changes

/kind

Fixes #

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[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: gauron99

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 59.77%. Comparing base (5a1bb65) to head (f6cc22b).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3200      +/-   ##
==========================================
+ Coverage   58.19%   59.77%   +1.57%     
==========================================
  Files         162      162              
  Lines       14763    14763              
==========================================
+ Hits         8592     8824     +232     
+ Misses       5177     4887     -290     
- Partials      994     1052      +58     

Flag	Coverage Δ
e2e-tests	41.50% <ø> (+8.09%)	⬆️
integration-tests	54.49% <ø> (+1.50%)	⬆️
unit-tests	45.53% <ø> (ø)

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[gauron99]

cc @creydr

[creydr]

Thanks for fixing

/lgtm