fix(@angular/build): normalize paths for Vitest runner output files #2080

Job	Run time
lint	2m 18s
build	18s
build-e2e-windows	19s
publish-snapshots	0s
test	0s
Browser Compatibility Tests	0s
e2e-package-managers	0s
e2e	0s
e2e-snapshots	0s
e2e-windows	-1s
	2m 54s

Provide feedback