Tests

Set MAX_DB_WORKER limit in `local_run` #1730

Job	Run time
Inspect test runner output in the context of a Github Workflow	27s
Test docker image	4m 19s
check	28s
Test we can build PyPI package	47s
Run test suite (ubuntu-20.04, 3.8)	20s
Run test suite (ubuntu-20.04, 3.9)	21s
Run test suite (ubuntu-20.04, 3.10)	8s
Run test suite (ubuntu-22.04, 3.8)	4s
Run test suite (ubuntu-22.04, 3.9)	6s
Run test suite (ubuntu-22.04, 3.10)	6s
Run test suite (windows-2019, 3.8)	7s
Run test suite (windows-2019, 3.9)	1s
Run test suite (windows-2019, 3.10)	4s
Run test suite (macos-12, 3.8)	5s
Run test suite (macos-12, 3.9)	8s
Run test suite (macos-12, 3.10)	5s
required-checks	2s
	7m 38s

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