fix(compiler-sfc): support using declared interface in normal script with defineProps() (#4522)

fix #4423

packages/compiler-sfc/__tests__/__snapshots__/compileScript.spec.ts.snap

@@ -866,6 +866,26 @@ export default /*#__PURE__*/_defineComponent({
 
       
       
+return {  }
+}
+
+})"
+`;
+
+exports[`SFC compile <script setup> with TypeScript defineProps w/ exported interface in normal script 1`] = `
+"import { defineComponent as _defineComponent } from 'vue'
+
+        export interface Props { x?: number }
+      
+export default /*#__PURE__*/_defineComponent({
+  props: {
+    x: { type: Number, required: false }
+  },
+  setup(__props: any, { expose }) {
+  expose()
+
+        
+      
 return {  }
 }