[Release-1.26] Docker and E2E Test Backports #27

Job	Run time
build / Build	6m 52s
E2E Tests (startup)	21m 32s
Docker Tests (basics)	1m 2s
E2E Tests (s3)	11m 24s
Docker Tests (bootstraptoken)	50s
E2E Tests (btrfs)	4m 33s
Docker Tests (cacerts)	56s
E2E Tests (externalip)	7m 25s
Docker Tests (lazypull)	1m 15s
E2E Tests (privateregistry)	9m 12s
Docker Tests (upgrade)	29s
	1h 5m 30s

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