Expose a Brokers audience in its status

[creydr]

Fixes #7184

Proposed Changes

• 🎁 Expose audience in Broker status

Pre-review Checklist

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

Hints:

• Actually auth.GetAudience() should have only accepted a kmeta.Accessor (includes metav1.TypeMeta and metav1.ObjectMeta), to construct the audience string. Anyhow broker.ReconcileKind() does not always get a broker object with provisioned TypeMeta, so I had to pass the Group and Kind directly.

Release Note

Expose OIDC audience of a Broker in its status

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.02% 🎉

Comparison is base (7876f12) 77.73% compared to head (6eaecce) 77.75%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7237      +/-   ##
==========================================
+ Coverage   77.73%   77.75%   +0.02%     
==========================================
  Files         246      247       +1     
  Lines       13284    13298      +14     
==========================================
+ Hits        10326    10340      +14     
  Misses       2435     2435              
  Partials      523      523              

Files Changed	Coverage Δ
pkg/apis/eventing/v1/broker_lifecycle.go	100.00% <100.00%> (ø)
pkg/apis/eventing/v1/test_helper.go	92.68% <100.00%> (+0.37%)	⬆️
pkg/auth/audience.go	100.00% <100.00%> (ø)
pkg/reconciler/broker/broker.go	77.89% <100.00%> (+0.61%)	⬆️

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[creydr]

Rebased after #7189 merged

/assign @pierDipi

[pierDipi]

/lgtm
/approve

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

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

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[pierDipi]

Thanks @creydr

[creydr]

/retest