More consistent behavior for --no_wait. #301

Job	Run time
deploy	20s
test (3.9, lint)	38s
test (3.9, lint_docs)	1m 13s
test (3.9, unit-nonredundant-noclientbuild-noshed-gx-2205)	1m 3s
test (3.9, unit-nonredundant-noclientbuild-noshed-gx-dev)	1m 3s
test (3.9, unit-quick)	1m 6s
test (3.9, unit-nonredundant-noclientbuild-noshed-nogx)	1m 12s
test (3.9, unit-diagnostic-servebasic-gx-dev)	5m 15s
test (3.9, unit-diagnostic-serveclientcmd)	5m 0s
test (3.12, unit-quick)	1m 10s
test (3.12, mypy)	48s
test (3.9, unit-nonredundant-noclientbuild-noshed-gx-231)	1m 9s
test (3.9, mypy)	45s
test (3.12, lint)	36s
	21m 18s

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