refactor(@angular-devkit/architect): correct misused promises lint fa… #2279

Job	Run time
list	21s
workflow (devkit-core-tests)	1m 24s
workflow (devkit-core-tests-rerun)	1m 31s
workflow (build-cli)	1m 36s
workflow (modules-builder-tests)	1m 45s
workflow (build-unit-tests)	2m 9s
	8m 46s

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