refactor(@schematics/angular): add trailing commas to generated direc… #2262

Job	Run time
list	24s
workflow (modules-builder-tests)	1m 58s
workflow (build-cli)	1m 48s
workflow (devkit-core-tests-rerun)	1m 26s
workflow (build-unit-tests)	2m 8s
workflow (devkit-core-tests)	1m 17s
	9m 1s

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