fix(@angular/build): only require karma-coverage when coverage is enabled - #34500

fix(@angular/build): only require karma-coverage when coverage is enabled#34500

MeAkib wants to merge 3 commits into

angular:mainangular/angular-cli:mainfrom

MeAkib:fix/unit-test-karma-coverage-dependencyMeAkib/angular-cli:fix/unit-test-karma-coverage-dependencyCopy head branch name to clipboard