chore(framework-integ): compile config.ts (#27200)

otherwise this [file](https://github.com/aws/aws-cdk/blob/main/packages/%40aws-cdk-testing/framework-integ/test/config.ts) does not get compiled at build time and leads (at least my local setup) to believe the nodejs runtime is node16, not node18.

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Author: kaizencc

packages/@aws-cdk-testing/framework-integ/tsconfig.json

@@ -18,6 +18,7 @@
         "incremental": true
     },
     "include": [
+        "config.ts",
         "**/*.ts",
         "**/*.d.ts"
     ],