[WIP] Split E2E Drone pipeline into 3 parallel chunks #8929

Job	Run time
build / Build	6m 55s
Integration Tests (certrotation)	1m 54s
Integration Tests (cacertrotation)	1m 34s
Integration Tests (etcdrestore)	2m 6s
Integration Tests (localstorage)	1m 28s
Integration Tests (startup)	6m 37s
Integration Tests (custometcdargs)	48s
Integration Tests (etcdsnapshot)	7m 41s
Integration Tests (kubeflags)	6m 36s
Integration Tests (longhorn)	3m 9s
Integration Tests (secretsencryption)	2m 49s
Integration Tests (flannelnone)	1m 43s
	43m 20s

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