CI docker daemon not running

[leezu]

[2020-11-30T22:11:34.910Z] 2020-11-30 22:11:32,782 - root - INFO - Running command: 'DOCKER_CACHE_REGISTRY=mxnetci docker-compose -f docker/docker-compose.yml pull ubuntu_cpu'

[2020-11-30T22:11:35.472Z] Couldn't connect to Docker daemon at http+docker://localhost - is it running?

Affects #19604 #19588

cc @rondogency

[josephevans]

I created updated AMIs which should solve this for the short-term, but looking into longer term solutions.