add wait command #1708

Job	Run time
build-worker (java)	2m 36s
build-worker (go)	1m 38s
build-worker (typescript)	2m 46s
build-worker (python)	2m 14s
build-worker (dotnet)	2m 21s
test-kitchensink (python)	1m 56s
prepare-for-docker-push	5s
test-kitchensink (java)	4m 8s
test-kitchensink (go)	2m 4s
build-ks-gen-and-ensure-protos-up-to-date	1m 24s
check-worker (typescript)	2m 1s
test-kitchensink (dotnet)	2m 9s
check-worker (dotnet)	1m 28s
check-worker (go)	1m 18s
test-kitchensink (typescript)	2m 39s
test-omes	1m 49s
check-worker (java)	1m 43s
build-cli	2m 10s
check-worker (python)	59s
push-docker-images / build-go-docker-images / Publish go to Docker Hub	9m 52s
push-docker-images / build-python-docker-images / Publish python to Docker Hub	11m 2s
push-docker-images / build-cli-docker-images / Publish CLI to Docker Hub	20m 7s
push-docker-images / build-java-docker-images / Publish java to Docker Hub	17m 43s
push-docker-images / build-typescript-docker-images / Publish typescript to Docker Hub	16m 11s
push-docker-images / build-dotnet-docker-images / Publish dotnet to Docker Hub	13m 42s
	2h 6m 5s

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