refactor(@angular/build): expose dev-server options normalization fun… #1665

Job	Run time
list	24s
workflow (devkit-core-tests)	31s
workflow (devkit-core-tests-rerun)	28s
workflow (build-cli)	29s
workflow (modules-builder-tests)	27s
workflow (build-unit-tests)	26s
	2m 45s

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