chore(aws-util-test): rename vitest.config.integ.ts to *.mts

Author: trivikr

private/aws-util-test/package.json

@@ -11,8 +11,8 @@
     "build:types:downlevel": "downlevel-dts dist-types dist-types/ts3.4",
     "clean": "rimraf ./dist-* && rimraf *.tsbuildinfo",
     "prepack": "yarn run clean && yarn run build",
-    "test:integration": "yarn g:vitest run -c vitest.config.integ.js",
-    "test:integration:watch": "yarn g:vitest watch -c vitest.config.integ.js"
+    "test:integration": "yarn g:vitest run -c vitest.config.integ.mts",
+    "test:integration:watch": "yarn g:vitest watch -c vitest.config.integ.mts"
   },
   "main": "./dist-cjs/index.js",
   "module": "./dist-es/index.js",