Re-serve v1alpha2 ClusterGroup (#5277) #26970

Job	Run time
Check whether tests need to be run based on diff	21s
Build Antrea image to be used for Kind e2e tests	11m 2s
Build Flow Aggregator image to be used for Kind e2e tests	6m 43s
E2e tests on a Kind cluster on Linux (noEncap)	49m 2s
E2e tests on a Kind cluster on Linux	50m 56s
E2e tests on a Kind cluster on Linux with all features enabled	1h 4m 27s
E2e tests on a Kind cluster on Linux with non default values (proxyAll=true, LoadBalancerMode=DSR...	52m 43s
E2e tests on a Kind cluster on Linux for Flow Visibility	6m 45s
E2e tests on a Kind cluster on Linux (hybrid)	49m 15s
Upgrade from Antrea version N-1	9m 37s
Upgrade from Antrea version N-2	9m 2s
API compatible with client version N-2	9m 25s
API compatible with client version N-1	8m 58s
Validate metrics in Prometheus document match running deployment's	2m 38s
Delete uploaded images	0s
	5h 30m 54s

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