refactor(@angular/cli): support copying config files to temp package … #2841

Job	Run time
list	36s
workflow (build-cli)	1m 45s
workflow (build-unit-tests)	2m 23s
workflow (devkit-core-tests-rerun)	1m 30s
workflow (devkit-core-tests)	1m 23s
workflow (modules-builder-tests)	1m 40s
	9m 17s

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