refactor(@schematics/angular): add Karma configuration analyzer and c… #709

Job	Run time
list	25s
workflow (modules-builder-tests)	33s
workflow (build-cli)	30s
workflow (devkit-core-tests-rerun)	26s
workflow (devkit-core-tests)	32s
workflow (build-unit-tests)	30s
	2m 56s

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