Improve E2E Aftersuite cleanup #1997

Job	Run time
build / Build	6m 49s
Integration Tests (certrotation)	3m 9s
Integration Tests (etcdrestore)	2m 9s
Integration Tests (localstorage)	1m 34s
Integration Tests (startup)	6m 40s
Integration Tests (custometcdargs)	1m 18s
Integration Tests (etcdsnapshot)	8m 2s
Integration Tests (kubeflags)	7m 5s
Integration Tests (longhorn)	2m 36s
Integration Tests (secretsencryption)	2m 18s
Integration Tests (flannelnone)	1m 42s
	43m 22s

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