Bump upload and download actions to v4 (#9666) #2010

Job	Run time
build / Build	6m 17s
Integration Tests (certrotation)	1m 20s
Integration Tests (etcdrestore)	1m 35s
Integration Tests (localstorage)	1m 6s
Integration Tests (startup)	6m 48s
Integration Tests (custometcdargs)	18s
Integration Tests (etcdsnapshot)	7m 50s
Integration Tests (kubeflags)	6m 59s
Integration Tests (longhorn)	2m 46s
Integration Tests (secretsencryption)	1m 37s
Integration Tests (flannelnone)	54s
	37m 30s

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