Use shareable Vitest config

Author: aryaemami59

packages/rtk-query-codegen-openapi/vitest.config.mts

@@ -1,4 +1,5 @@
 import { createVitestConfig } from '@reduxjs/vitest-config';
+import path from 'node:path';
 
 export default createVitestConfig({
   test: {
@@ -8,6 +9,7 @@ export default createVitestConfig({
             .pathname,
         }
       : undefined,
+    pool: 'forks',
     setupFiles: ['./test/vitest.setup.ts'],
   },
 });