refactor(compiler): split compiler and core (#18683)

After this, neither @angular/compiler nor @angular/comnpiler-cli depend
on @angular/core.

This add a duplication of some interfaces and enums which is stored
in @angular/compiler/src/core.ts

BREAKING CHANGE:
- `@angular/platform-server` now additionally depends on
  `@angular/platform-browser-dynamic` as a peer dependency.


PR Close #18683

packages/core/src/di/injection_token.ts

@@ -64,4 +64,7 @@ export class InjectionToken<T> extends OpaqueToken {
   constructor(desc: string) { super(desc); }
 
   toString(): string { return `InjectionToken ${this._desc}`; }
+
+  /** @internal */
+  get ngMetadataName() { return 'InjectionToken'; }
 }