feat: Add auth-proxy sidecar and EventPolicy support to EventTransformer #7038

Job	Run time
Unit Test (eventing-gitlab, knative-extensions)	5m 32s
Unit Test (eventing-autoscaler-keda, knative-extensions)	4m 47s
Unit Test (eventing-rabbitmq, knative-extensions)	7m 8s
Unit Test (eventing-ceph, knative-extensions)	5m 21s
Unit Test (eventing-kafka-broker, knative-extensions)	10m 2s
Unit Test (eventing-github, knative-extensions)	6m 23s
	39m 13s

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