feat(@angular/build): add dataurl, base64 loaders #1247

Job	Run time
list	31s
workflow (devkit-core-tests-rerun)	1m 16s
workflow (modules-builder-tests)	1m 38s
workflow (build-cli)	1m 29s
workflow (build-unit-tests)	2m 9s
workflow (devkit-core-tests)	1m 11s
	8m 14s

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