Generate baseline hashes during tests to reduce flakiness #230

Job	Run time
test / Load tox environments	6s
test / py311-test-mpl38 (ubuntu-latest)	4m 51s
test / py311-test-mpl38 (macos-latest)	1m 52s
test / py311-test-mpl38 (windows-latest)	4m 21s
test / py313-test-mpl310 (ubuntu-latest)	4m 49s
test / py313-test-mpl310 (macos-latest)	2m 1s
test / py313-test-mpl310 (windows-latest)	4m 18s
test / py311-test-mpl39 (ubuntu-latest)	4m 48s
test / py312-test-mpl39 (ubuntu-latest)	4m 2s
test / py311-test-mpl310 (ubuntu-latest)	3m 49s
test / py312-test-mpl310 (ubuntu-latest)	4m 12s
test / py313-test-mpldev-pytestdev (ubuntu-latest)	4m 10s
test / py311-test-mpl37-pytest74 (ubuntu-latest)	3m 40s
test / py39-test-mpl33-pytest62 (ubuntu-latest)	3m 42s
test / py39-test-mpl33 (ubuntu-latest)	6m 8s
test / py39-test-mpl33 (macos-13)	5m 41s
test / py39-test-mpl33 (windows-latest)	4m 39s
publish	0s
	1h 7m 9s

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