Bump actions/cache from 3 to 4 #86

Job	Run time
Check whether tests need to be run based on diff	18s
Build Antrea image to be used for Kind e2e tests	12m 29s
Build Flow Aggregator image to be used for Kind e2e tests	3m 31s
E2e tests on a Kind cluster on Linux with non default values (proxyAll=true, LoadBalancerMode=DSR...	46m 21s
E2e tests on a Kind cluster on Linux with all features enabled	55m 54s
API compatible with client version N-1	8m 46s
API compatible with client version N-2	9m 1s
E2e tests on a Kind cluster on Linux	45m 24s
E2e tests on a Kind cluster on Linux for Flow Visibility	29m 42s
E2e tests on a Kind cluster on Linux (hybrid)	17m 12s
E2e tests on a Kind cluster on Linux (noEncap)	36m 59s
NetworkPolicy conformance tests on a Kind cluster on Linux	8m 23s
Upgrade from Antrea version N-1	8m 43s
Upgrade from Antrea version N-2	9m 18s
Validate metrics in Prometheus document match running deployment's	2m 0s
Delete uploaded images	0s
	4h 54m 1s

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