perf(@angular-devkit/build-angular): skip FESM2015 from async
transformation
#20262
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Skip
async
transformation when the path matches a FESM2015 entrypoint. Ng-packagr doesn't allow changing the script target for entry-points which makes this possible https://github.com/ng-packagr/ng-packagr/blob/master/src/lib/ng-package/entry-point/compile-ngc.transform.ts#L48This is important to reduce greatly the cold build performance overhead when targeting ES2017+