Modify experimental features e2e test setup

[slinkydeveloper]

Signed-off-by: Francesco Guardiani francescoguard@gmail.com

See #5440 (comment) for more details

Proposed Changes

• 🧹 Now experimental features main code doesn't modify the feature CM anymore, but the action does it instead

Pre-review Checklist

• At least 80% unit test coverage: N/A
• E2E tests for any new behavior: N/A
• Docs PR for any user-facing impact: N/A
• Spec PR for any new API feature: N/A
• Conformance test for any change to the spec: N/A

[codecov]

Codecov Report

Merging #5479 (59b57b0) into main (ab3978c) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #5479   +/-   ##
=======================================
  Coverage   82.78%   82.78%           
=======================================
  Files         197      197           
  Lines        6093     6093           
=======================================
  Hits         5044     5044           
  Misses        724      724           
  Partials      325      325           

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[slinkydeveloper]

Works as expected: https://github.com/knative/eventing/pull/5479/checks?check_run_id=2771523236

That action step is executed only for experimental suite runs

[matzew]

/lgtm
/approve

[knative-prow-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: matzew, slinkydeveloper

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