tests

Remove the markers to disable specific slowly running tests #291

Job	Run time
Check Manifest	20s
linting	2m 3s
ubuntu-latest py3.9	48m 2s
ubuntu-latest py3.10	48m 1s
ubuntu-latest py3.11	53m 4s
macos-13 py3.11	1h 9m 48s
macos-latest py3.11	1h 7m 53s
windows-latest py3.11	52m 20s
Build source distribution	0s
Publish build distributions	0s
	5h 41m 31s

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