Refactor to depend on eventing-kafka-broker only, drop eventing-kafka

[dsimansk]

Changes

• Refactor to depend on eventing-kafka-broker only, drop eventing-kafka

This refactor drops eventing-kafka in favor of eventing-kafka-broker. The eventing-kafka won't have any new release, therefore we won't be able to satisfy releasability check and overall maintenance of this component.

/cc @creydr @Cali0707 @pierDipi

[codecov[bot]]

Codecov Report

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

Project coverage is 0.00%. Comparing base (bf5740a) to head (0cceb6e). Report is 12 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #482 +/- ## ====================================== Coverage 0.00% 0.00% ====================================== Files 15 15 Lines 984 757 -227 ====================================== + Misses 984 757 -227 ```

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[knative-prow[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

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

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Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/knative-extensions/eventing-autoscaler-keda/blob/main/OWNERS)~~ [dsimansk,pierDipi] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[dsimansk]

@pierDipi OK to unhold?

[dsimansk]

/unhold