feat(ivy): exclude declarations from injector imports (#29598)

Prior to this change, a module's imports and exports would be used verbatim
as an injectors' imports. This is detrimental for tree-shaking, as a
module's exports could reference declarations that would then prevent such
declarations from being eligible for tree-shaking.

Since an injector actually only needs NgModule references as its imports,
we may safely filter out any declarations from the list of module exports.
This makes them eligible for tree-shaking once again.

PR Close #29598

packages/compiler/src/compiler_facade_interface.ts

@@ -110,8 +110,8 @@ export interface R3InjectorMetadataFacade {
   name: string;
   type: any;
   deps: R3DependencyMetadataFacade[]|null;
-  providers: any;
-  imports: any;
+  providers: any[];
+  imports: any[];
 }
 
 export interface R3DirectiveMetadataFacade {