refactor(@angular/build): remove unnecessary realpath resolution for … #3996

Job	Run time
list	32s
workflow (build-cli)	1m 57s
workflow (devkit-core-tests-rerun)	1m 35s
workflow (devkit-core-tests)	1m 40s
workflow (build-unit-tests)	2m 23s
workflow (modules-builder-tests)	2m 30s
	10m 37s

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