Convert legacy docker tests from bash to golang #1599

Job	Run time
Build Go Tests	37s
build / Build	7m 31s
Docker Tests (basics)	1m 5s
Docker Tests In GO (basics)	1m 0s
Docker Tests (bootstraptoken)	41s
E2E Tests (startup)	17m 58s
Docker Tests In GO (bootstraptoken)	52s
Docker Tests (cacerts)	1m 2s
E2E Tests (s3)	8m 28s
Docker Tests In GO (cacerts)	52s
Docker Tests (compat)	2m 25s
E2E Tests (btrfs)	4m 46s
Docker Tests In GO (etcd)	1m 56s
Docker Tests (lazypull)	47s
E2E Tests (externalip)	4m 42s
Docker Tests In GO (lazypull)	56s
Docker Tests (upgrade)	2m 30s
E2E Tests (privateregistry)	5m 57s
Docker Tests In GO (skew)	2m 4s
E2E Tests (embeddedmirror)	5m 21s
Docker Tests In GO (upgrade)	1m 33s
E2E Tests (wasm)	4m 2s
	1h 17m 5s

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