refactor(@angular/cli): use streaming HTML parser in search documenta… #2149

Job	Run time
list	32s
workflow (devkit-core-tests)	1m 17s
workflow (modules-builder-tests)	1m 42s
workflow (build-cli)	1m 35s
workflow (devkit-core-tests-rerun)	1m 15s
workflow (build-unit-tests)	2m 15s
	8m 36s

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