Add a Prerequisite helper to check if the OIDC authentication feature flag is enabled

[creydr]

Allows to add a Prerequiste check in an e2e test, so the test runs only in case the authorization-oidc feature flag is enabled.

Usage:

f.Prerequisite("OIDC authentication is enabled", featureflags.AuthenticationOIDCEnabled())

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (7cba45b) 74.52% compared to head (578a6e7) 74.54%.
Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7609      +/-   ##
==========================================
+ Coverage   74.52%   74.54%   +0.02%     
==========================================
  Files         262      262              
  Lines       14970    14970              
==========================================
+ Hits        11157    11160       +3     
+ Misses       3223     3221       -2     
+ Partials      590      589       -1     

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[pierDipi]

/lgtm
/approve

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: creydr, pierDipi

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• test/OWNERS [creydr,pierDipi]

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[creydr]

/retest

[creydr]

/retest

[creydr]

/retest