windows: Use a clippy script instead of xtask (#25807)

Closes #ISSUE

Match the behaviour of our macOS and Linux tests

Release Notes:

- N/A *or* Added/Fixed/Improved ...

.github/workflows/ci.yml

@@ -273,8 +273,7 @@ jobs:
 
       - name: cargo clippy
         working-directory: ${{ env.ZED_WORKSPACE }}
-        # Windows can't run shell scripts, so we need to use `cargo xtask`.
-        run: cargo xtask clippy
+        run: ./script/clippy.ps1
 
       - name: Run tests
         uses: ./.github/actions/run_tests_windows