Remove NetworkManager check for nm-cloud.service #885

Job	Run time
build / Build	7m 10s
build-windows / Build	7m 5s
Integration Tests (windows)	1m 8s
Integration Tests (localstorage)	1m 29s
Integration Tests (etcdrestore)	2m 6s
Integration Tests (custometcdargs)	48s
Integration Tests (cacertrotation)	2m 41s
Integration Tests (startup)	8m 6s
Integration Tests (kubeflags)	7m 0s
Integration Tests (certrotation)	1m 39s
Integration Tests (flannelnone)	1m 24s
Integration Tests (longhorn)	3m 0s
Integration Tests (etcdsnapshot)	7m 37s
Integration Tests (secretsencryption)	2m 26s
	53m 39s

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