fix(@angular/build): prevent esbuild service child process leakage #3101

Job	Run time
lint	1m 59s
build	36s
build-e2e-windows	19s
e2e-windows	0s
test	0s
publish-snapshots	0s
e2e	0s
e2e-snapshots	0s
Browser Compatibility Tests	0s
e2e-package-managers	0s
	2m 54s

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