feat: add a global executions_cancellable option #616

Job	Run time
Collect changes / collect-changes	6s
Python tests / types-check	12s
Python tests / unit-tests (py313)	25s
Python tests / lint-and-format-check	25s
Python tests / unit-tests (py312)	26s
Python tests / unit-tests (py311)	25s
Python tests / unit-tests (py310)	25s
Python tests / unit-tests (py39)	25s
status-check	1s
	2m 50s

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