feat: add cancel method to the Execution object #682

Job	Run time
Collect changes / collect-changes	10s
Python tests / lint-and-format-check	41s
Python tests / unit-tests (py312)	6m 40s
Python tests / unit-tests (py313)	3m 3s
Python tests / unit-tests (py311)	2m 34s
Python tests / types-check	1m 5s
Python tests / unit-tests (py39)	2m 51s
Python tests / unit-tests (py310)	2m 31s
status-check	3s
	19m 38s

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