fix(@angular-devkit/schematics): remove lazy imports in node tasks #2599

Job	Run time
list	25s
workflow (modules-builder-tests)	1m 44s
workflow (devkit-core-tests)	1m 27s
workflow (devkit-core-tests-rerun)	1m 18s
workflow (build-cli)	1m 36s
workflow (build-unit-tests)	3m 24s
	9m 54s

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