fix(ivy): types in .d.ts files should account for generics (#24862)

Ivy definition types have a generic type which specifies the return
type of the factory function. For example:

static ngDirectiveDef<NgForOf, '[ngFor][ngForOf]'>

However, in this case NgForOf itself has a type parameter <T>. Thus,
writing the above is incorrect.

This commit modifies ngtsc to understand the genericness of NgForOf and
to write the following:

static ngDirectiveDef<NgForOf<any>, '[ngFor][ngForOf]'>

PR Close #24862

packages/compiler-cli/src/ngtsc/annotations/src/directive.ts

@@ -143,6 +143,7 @@ export function extractDirectiveMetadata(
     inputs: {...inputsFromMeta, ...inputsFromFields},
     outputs: {...outputsFromMeta, ...outputsFromFields}, queries, selector,
     type: new WrappedNodeExpr(clazz.name !),
+    typeArgumentCount: (clazz.typeParameters || []).length,
     typeSourceSpan: null !, usesInheritance,
   };
   return {decoratedElements, decorator: directive, metadata};