Remove uses of pkg_resources and distutils #1266

Job	Run time
type-check	22s
lint	20s
unit-test (ubuntu-20.04, 3.7)	1m 23s
end-to-end-test (ubuntu-20.04, local)	24s
unit-test (ubuntu-20.04, 3.8)	40s
end-to-end-test (ubuntu-20.04, ssh)	1m 26s
unit-test (ubuntu-20.04, 3.9)	39s
end-to-end-test (ubuntu-20.04, docker)	32s
unit-test (ubuntu-20.04, 3.10)	39s
end-to-end-test (ubuntu-latest, local)	31s
unit-test (ubuntu-20.04, 3.11)	35s
end-to-end-test (ubuntu-latest, ssh)	1m 20s
unit-test (ubuntu-20.04, 3.12)	44s
unit-test (ubuntu-latest, 3.7)	1m 24s
end-to-end-test (ubuntu-latest, docker)	25s
unit-test (ubuntu-latest, 3.8)	40s
end-to-end-test (macos-latest, local)	23s
unit-test (ubuntu-latest, 3.9)	44s
unit-test (ubuntu-latest, 3.10)	43s
unit-test (ubuntu-latest, 3.11)	39s
unit-test (ubuntu-latest, 3.12)	1m 21s
unit-test (macos-12, 3.11)	1m 2s
unit-test (windows-2022, 3.11)	1m 28s
tests-done	2s
	18m 26s

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