Duplicate debug attach options appear in the Debug or Configure Active File dropdown if any attach configs exist in launch.json

[sean-mcmanus]

1. Add some attach configurations to launch.json.
2. Use the Debug or Configure Active options (top right of a file).

Bug: The dropdown shows duplicates (2 for Configure and 4 for Debug), which seems buggy and confusing. I'm not sure what the difference is between the duplicate options.

I hit this while investigating #13569 , but it was a pre-existing issue.

[github-actions]

Thank you for reporting this issue. We’ll let you know if we need more information to investigate it. Additionally, if you're working with GDB/LLDB, please note that the code is open source at https://github.com/microsoft/MIEngine/wiki/Contributing-Code . Your contributions are always welcome and appreciated.