Convert docker conformance test to go test framework #1993

Job	Run time
Build Go Tests	23s
build / Build	7m 26s
Docker Tests (basics)	1m 1s
Docker Tests (bootstraptoken)	41s
E2E Tests (autoimport)	5m 50s
Docker Tests In GO	0s
Docker Tests (cacerts)	56s
E2E Tests (startup)	9m 24s
Docker Tests (compat)	1m 19s
E2E Tests (s3)	7m 24s
Docker Tests (lazypull)	56s
E2E Tests (btrfs)	5m 6s
Docker Tests (upgrade)	2m 20s
E2E Tests (externalip)	4m 19s
E2E Tests (privateregistry)	5m 34s
E2E Tests (embeddedmirror)	4m 47s
E2E Tests (wasm)	4m 23s
	1h 1m 49s

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