fix: Generated types interface name (#9307)

**What**
Fix interface name in the output generated types

packages/modules/index/src/utils/gql-to-types.ts

@@ -16,6 +16,7 @@ export async function gqlSchemaToTypes(schema: string) {
   await ModulesSdkGqlSchemaToTypes({
     schema: executableSchema,
     filename,
+    interfaceName: "IndexServiceEntryPoints",
     outputDir: dir,
     joinerConfigs: MedusaModule.getAllJoinerConfigs(),
   })