Isolated start-up and shut-down graphs. #8754

Job	Run time
1/4	14m 2s
2/4	12m 7s
3/4	15m 13s
4/4	13m 28s
py-3-latest	22m 6s
flaky	6m 8s
_remote_background_indep_poll	5m 25s
_remote_background_indep_tcp	7m 2s
macos 1/5	17m 34s
macos 2/5	22m 34s
codecov	0s
	2h 15m 39s

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