Suppress python callstacks on lint/ts/scss command failure #3938

Job	Run time
Formatting	1m 33s
Linter	2m 8s
Backup process	2m 58s
Build wheel	1m 39s
Build nix environment on MacOS	2m 51s
MyPy	1m 33s
Test + Coverage	2m 44s
Test Frontend	3m 17s
Test (shuffled order)	2m 26s
Test if testdata is up to date	2m 6s
Test Typescript	1m 49s
Install wheel with system Python	13s
	25m 17s

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