bump k8s deps to v0.30.3 #2436

Job	Run time
Unit Test (knative/serving)	9m 34s
Unit Test (knative/networking)	4m 2s
Unit Test (knative/eventing)	12m 53s
Unit Test (knative/operator)	6m 13s
Unit Test (knative/client)	7m 11s
Unit Test (knative-extensions/eventing-autoscaler-keda)	4m 54s
Unit Test (knative-extensions/eventing-ceph)	4m 50s
Unit Test (knative-extensions/eventing-github)	5m 32s
Unit Test (knative-extensions/eventing-gitlab)	5m 18s
Unit Test (knative-extensions/eventing-kafka-broker)	9m 30s
Unit Test (knative-extensions/eventing-rabbitmq)	4m 56s
Unit Test (knative-extensions/eventing-redis)	5m 55s
Unit Test (knative-extensions/kn-plugin-admin)	14m 35s
Unit Test (knative-extensions/net-certmanager)	4m 39s
Unit Test (knative-extensions/net-contour)	4m 47s
Unit Test (knative-extensions/net-istio)	5m 19s
Unit Test (knative-extensions/net-kourier)	4m 54s
	1h 55m 2s

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