refactor(@angular/build): remove unnecessary realpath resolution for … #3995

Job	Run time
list	32s
workflow (devkit-core-tests)	1m 39s
workflow (build-unit-tests)	2m 32s
workflow (modules-builder-tests)	2m 26s
workflow (devkit-core-tests-rerun)	1m 41s
workflow (build-cli)	1m 54s
	10m 44s

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