chore: disable bun run test buttons if bun extension is installed (#10775)

If the bun extension is installed, a "Run Test" button is displayed in
int test files. Clicking it will use bun to run those tests, which will
always fail.

This PR disables that test button, as it's useless in our repo

![CleanShot 2025-01-23 at 17 39
03@2x](https://github.com/user-attachments/assets/918fa729-8076-4214-a3d2-f824a4fbfc34)

The real button here is "Run". Clicking "Run Test" instead will use bun
and fail. Confusing, right?

.vscode/settings.json

@@ -52,5 +52,7 @@
   "jestrunner.jestCommand": "pnpm exec cross-env NODE_OPTIONS=\"--no-deprecation\" node 'node_modules/jest/bin/jest.js'",
   "jestrunner.debugOptions": {
     "runtimeArgs": ["--no-deprecation"]
-  }
+  },
+  // Essentially disables bun test buttons
+  "bun.test.filePattern": "bun.test.ts"
 }