build(deps-dev): bump @vscode/test-electron in /vscode

Bumps [@vscode/test-electron](https://github.com/Microsoft/vscode-test) from 2.5.2 to 3.0.0.
- [Changelog](https://github.com/microsoft/vscode-test/blob/main/CHANGELOG.md)
- [Commits](https://github.com/Microsoft/vscode-test/commits)

---
updated-dependencies:
- dependency-name: "@vscode/test-electron"
  dependency-version: 3.0.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

vscode/package-lock.json

@@ -526,7 +526,7 @@
     "@types/sinon": "^21.0.1",
     "@types/vscode": "^1.120.0",
     "@vscode/test-cli": "^0.0.12",
-    "@vscode/test-electron": "^2.4.1",
+    "@vscode/test-electron": "^3.0.0",
     "chai": "^6.2.2",
     "mocha": "^11.7.6",
     "sinon": "^22.0.0",