Bump K8s dependencies to v0.28.5 and set K8s min-version to 1.27 #2229

Job	Run time
Unit Test (knative/serving)	5m 48s
Unit Test (knative/networking)	4m 58s
Unit Test (knative/eventing)	13m 25s
Unit Test (knative/operator)	6m 35s
Unit Test (knative/client)	3m 36s
Unit Test (knative-extensions/eventing-autoscaler-keda)	5m 0s
Unit Test (knative-extensions/eventing-ceph)	4m 55s
Unit Test (knative-extensions/eventing-github)	5m 39s
Unit Test (knative-extensions/eventing-gitlab)	5m 6s
Unit Test (knative-extensions/eventing-kafka)	6m 51s
Unit Test (knative-extensions/eventing-kafka-broker)	9m 40s
Unit Test (knative-extensions/eventing-rabbitmq)	11m 44s
Unit Test (knative-extensions/eventing-redis)	6m 16s
Unit Test (knative-extensions/kn-plugin-admin)	2m 42s
Unit Test (knative-extensions/net-certmanager)	4m 34s
Unit Test (knative-extensions/net-contour)	4m 51s
Unit Test (knative-extensions/net-http01)	4m 11s
Unit Test (knative-extensions/net-istio)	1m 32s
Unit Test (knative-extensions/net-kourier)	3m 12s
	1h 50m 35s

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