[WIP] CrossNamespace: Data Plane Changes for Broker Filter

[yijie-04]

Data plane changes are needed for the broker filter to correctly reference to brokers in the case of cross namespace referencing.

Proposed Changes

• :gift: Add new feature

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

Docs

[yijie-04]

/cc @pierDipi @Cali0707

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 10.00000% with 18 lines in your changes are missing coverage. Please review.

Project coverage is 68.96%. Comparing base (7e1c082) to head (49aa6bc). Report is 52 commits behind head on main.

:exclamation: Current head 49aa6bc differs from pull request most recent head d164904

Please upload reports for the commit d164904 to get more accurate results.

Files	Patch %	Lines
pkg/broker/filter/filter_handler.go	10.00%	16 Missing and 2 partials :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7913      +/-   ##
==========================================
- Coverage   69.22%   68.96%   -0.26%     
==========================================
  Files         339      341       +2     
  Lines       19494    15869    -3625     
==========================================
- Hits        13494    10944    -2550     
+ Misses       5337     4249    -1088     
- Partials      663      676      +13     

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[yijie-04]

@Cali0707 @pierDipi Do you think we should have a test case with BrokerRef here?

[knative-prow[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Cali0707, yijie-04

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