fix(@angular-devkit/architect): improve error message when configurat… #654

Job	Run time
list	38s
workflow (build-cli)	2m 4s
workflow (modules-builder-tests)	2m 25s
workflow (devkit-core-tests)	1m 57s
workflow (devkit-core-tests-rerun)	1m 55s
workflow (build-unit-tests)	3m 1s
	12m 0s

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