[release-1.19] Fix: PodAutoscaler not reconciled due to missing class annotation

[knative-prow-robot]

This is an automated cherry-pick of #16141

[codecov]

Codecov Report

❌ Patch coverage is 72.72727% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 80.16%. Comparing base (d11fb31) to head (681fcfd).
⚠️ Report is 2 commits behind head on release-1.19.

Files with missing lines	Patch %	Lines
pkg/reconciler/revision/cruds.go	72.72%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@               Coverage Diff                @@
##           release-1.19   #16191      +/-   ##
================================================
+ Coverage         80.09%   80.16%   +0.06%     
================================================
  Files               214      214              
  Lines             16909    16920      +11     
================================================
+ Hits              13544    13564      +20     
+ Misses             3004     2998       -6     
+ Partials            361      358       -3     

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[nader-ziada]

/retest

[dprotaso]

blocked on #16192

[dprotaso]

/retest

[dprotaso]

/lgtm
/approve

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dprotaso, knative-prow-robot

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• OWNERS [dprotaso]

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[nader-ziada]

/retest

Error: init failed to get project from boskos: failed to get a "gke-project" from boskos: resources not found

[dprotaso]

/retest