fix(ivy): ensure factory statements are emitted correctly (#25425)

A small bug caused base factory variable statements for @Component to
not be emitted properly. At the same time as this is fixed, those
statements are now emitted as const.

PR Close #25425

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

@@ -165,7 +165,7 @@ export class ComponentDecoratorHandler implements DecoratorHandler<R3ComponentMe
     return {
       name: 'ngComponentDef',
       initializer: res.expression,
-      statements: [],
+      statements: res.statements,
       type: res.type,
     };
   }