refactor(@angular/build): expose dev-server options normalization fun… #3050

Job	Run time
list	24s
workflow (build-unit-tests)	2m 26s
workflow (build-cli)	1m 55s
workflow (modules-builder-tests)	1m 57s
workflow (devkit-core-tests)	1m 28s
workflow (devkit-core-tests-rerun)	1m 31s
	9m 41s

Provide feedback