refactor(@angular/cli): support copying config files to temp package … #2609

Job	Run time
lint	1m 53s
build	21s
build-e2e-windows	25s
Browser Compatibility Tests	0s
publish-snapshots	0s
test	0s
e2e-package-managers	0s
e2e	0s
e2e-snapshots	0s
e2e-windows	-1s
	2m 38s

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