Use IPv6 in case is the first configured IP with dualstack #5838

Job	Run time
build / Build	11m 59s
Integration Tests (certrotation)	2m 28s
Integration Tests (etcdrestore)	3m 10s
Integration Tests (localstorage)	2m 37s
Integration Tests (startup)	8m 34s
Integration Tests (custometcdargs)	1m 9s
Integration Tests (etcdsnapshot)	8m 23s
Integration Tests (kubeflags)	7m 17s
Integration Tests (longhorn)	3m 38s
Integration Tests (secretsencryption)	3m 44s
	52m 59s

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