Select a debug configuration quick pick should remember choice per file

[isidorn]

Hi VS Code dev here 👋

1. Have python extension installed, have a hello.py simple one line python script, do not have a launch.json
2. Press F5 -> notice the quick pick asking me what kind of python debugging I want to do. Choose. Debug.
3. Press F5 again -> again the same quick pick ask 🐛

It would be very cool if we would save the user choice per active file if we can detect that a debug session was a success.
This would make the debugging flow much easier for new users imho.

[brettcannon]

We are launching support for this per session in the 2021.9 release.