Describe the bug
On windows, test directories with too many test files output is just The command line is too long // Exited (1)
To Reproduce
- Be on windows
- have a directory with lots of tests
- the tests won't be run
Expected behavior
Should pass a single folder and not each individual test file
Screenshots

I've got 34 lines here with roughly 125 characters each.
Please complete the following information:
- Operating System and version: Win 11 Business 22621.1265
- VS Code version: 1.78.2
- Dart extension version: v3.64.0
- Dart/Flutter SDK version: 2.19.6
- Target device (if the issue relates to Flutter debugging): simply running tests on windows