Add handling of `.skip_lint` file(s) #225

Job	Run time
Setup as in CI for workflows (3.11)	3m 19s
Setup as in PR for workflows (3.11)	1m 8s
Test linting of workflows (3.11)	37s
Test testing of workflows (0, 3.11)	7m 2s
Test testing of workflows (1, 3.11)	6m 38s
Test combining 'chunked' test results (3.11)	39s
	19m 23s

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