feat(core): use angular ivy (#4369)

* chore(deps): bump angular and typescript

- required to enable ivy output & partial compilation mode

* chore(build): enable ivy output & partial compilation mode

- change ngx builds to use ivy
- remove some code that is no longer required with ivy

scripts/tasks/build-ngx.ts

@@ -2,7 +2,6 @@ import {
   cleanupNgx,
   generateLegacyBundles,
   generateDeclarationFiles,
-  modifyMetadata,
   transpileNgx,
   transpileNgxCore,
 } from '../build/ngx';
@@ -11,5 +10,4 @@ transpileNgxCore();
 transpileNgx();
 generateLegacyBundles();
 generateDeclarationFiles();
-modifyMetadata();
 cleanupNgx();