Isolated start-up and shut-down graphs. #10034

Job	Run time
2/4	16m 9s
3/4	20m 26s
1/4	18m 17s
flaky	7m 50s
py-3-latest	13m 8s
_remote_background_indep_tcp	9m 1s
_remote_background_indep_poll	5m 48s
4/4	18m 53s
macos 2/5	19m 53s
macos 1/5	18m 10s
codecov	0s
	2h 27m 35s

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