refactor(@angular/build): normalize unit test coverage options for co… #2242

Job	Run time
list	24s
workflow (build-unit-tests)	2m 23s
workflow (devkit-core-tests)	1m 12s
workflow (modules-builder-tests)	1m 50s
workflow (devkit-core-tests-rerun)	1m 17s
workflow (build-cli)	1m 33s
	8m 39s

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