Adds apiVersion as an extension to api source events

[gab-satchi]

• 🎁 Adds apiVersion as an extension to APIServerSource events

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

Release Note

🎁  APIServerSource events includes apiVersion of the object

// We copy the resource kind, name and namespace as extensions so that triggers can do the filter based on these attributes

Kind alone isn't always unique. With the fully qualified gvk, filtering at the Trigger will be more consistent. I left Kind as a separate extension instead of bringing everything under a gvk extension to maintain backwards compatibility.

[codecov]

Codecov Report

Base: 80.53% // Head: 80.53% // Increases project coverage by +0.00% 🎉

Coverage data is based on head (ee1f08c) compared to base (8b7551c).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6696   +/-   ##
=======================================
  Coverage   80.53%   80.53%           
=======================================
  Files         236      236           
  Lines       12100    12101    +1     
=======================================
+ Hits         9745     9746    +1     
  Misses       1867     1867           
  Partials      488      488           

Impacted Files	Coverage Δ
pkg/adapter/apiserver/events/events.go	94.17% <100.00%> (+0.05%)	⬆️

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[pierDipi]

/retest

[pierDipi]

Can we cover this with an e2e test?

[gab-satchi]

Failures aren't related to the e2e test this PR changes

/retest

[pierDipi]

/lgtm
/approve

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: gab-satchi, gabo1208, pierDipi

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[gab-satchi]

/retest