Update eventtype v1beta3 type to reflect spec changes

[Cali0707]

Part of #7265

Proposed Changes

• Update the eventtype CRD to have the new v1beta3 schema
• Update the eventtype v1beta3 type and validation to reflect the new schema
• Fix unit tests

[Cali0707]

/cc @dsimansk @matzew @pierDipi

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 69.22%. Comparing base (580f3c7) to head (2c3a610). Report is 29 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7708      +/-   ##
==========================================
+ Coverage   69.04%   69.22%   +0.17%     
==========================================
  Files         338      339       +1     
  Lines       19350    19494     +144     
==========================================
+ Hits        13360    13494     +134     
- Misses       5328     5337       +9     
- Partials      662      663       +1     

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[Cali0707]

/cc @matzew @pierDipi @dsimansk

[Cali0707]

/cc @matzew @pierDipi

Any thoughts on this PR? Can we unhold, or are there more changes needed?

[Cali0707]

/cc @matzew @dsimansk

[Cali0707]

/cc @pierDipi

[matzew]

/test reconciler-tests

[knative-prow[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Cali0707, dsimansk, pierDipi

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[pierDipi]

/unhold

[pierDipi]

/test reconciler-tests

[Cali0707]

/test reconciler-tests

[knative-prow[bot]]

@Cali0707: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
reconciler-tests_eventing_main	2c3a610693df94661f94b251bb3bdc1d71217ff2	link	unknown	/test reconciler-tests

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[Cali0707]

/test reconciler-tests