refactor(@angular/cli): add architect target discovery to list_projec… #3603

Job	Run time
list	23s
workflow (devkit-core-tests-rerun)	1m 49s
workflow (build-cli)	2m 7s
workflow (devkit-core-tests)	1m 52s
workflow (modules-builder-tests)	1m 55s
workflow (build-unit-tests)	2m 22s
	10m 28s

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