feat: support setting up existing container as devcontainer #849

Job	Run time
test-e2e-windows (build)	1m 18s
test-e2e-windows (build)	1m 18s
test-e2e-windows (ide)	4m 27s
test-e2e-windows (ide)	4m 27s
test-e2e (build)	3m 47s
test-e2e (build)	3m 47s
test-e2e-windows (ssh)	1m 23s
test-e2e-windows (ssh)	1m 23s
test-e2e (ide)	4m 23s
test-e2e (ide)	4m 23s
test-e2e-windows (up-docker)	5m 34s
test-e2e-windows (up-docker)	5m 34s
test-e2e (integration)	4m 18s
test-e2e (integration)	4m 18s
test-e2e-windows (up-docker-build)	5m 33s
test-e2e-windows (up-docker-build)	5m 33s
test-e2e (machine)	3m 22s
test-e2e (machine)	3m 22s
test-e2e-windows (up-docker-compose)	11m 10s
test-e2e-windows (up-docker-compose)	11m 10s
test-e2e (machineprovider)	4m 25s
test-e2e (machineprovider)	4m 25s
test-e2e (provider)	3m 17s
test-e2e (provider)	3m 17s
test-e2e (proxyprovider)	4m 26s
test-e2e (proxyprovider)	4m 26s
test-e2e (ssh)	3m 38s
test-e2e (ssh)	3m 38s
test-e2e (up)	4m 41s
test-e2e (up)	3m 24s
test-e2e (up-docker)	4m 45s
test-e2e (up-docker)	3m 8s
test-e2e (up-podman)	4m 14s
test-e2e (up-podman)	4m 14s
test-e2e (up-docker-compose)	4m 54s
test-e2e (up-docker-compose)	3m 29s
test-e2e (up-docker-build)	4m 9s
test-e2e (up-docker-build)	4m 9s
test-e2e (up-docker-compose-build)	4m 41s
test-e2e (up-docker-compose-build)	4m 41s
	2h 52m 31s

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