Fix #6380: Add configuration attribute to DebugSession

[BroKun]

Signed-off-by: Brokun brokun0128@gmail.com

What it does

Add configuration attribute to DebugSession

How to test

1. Add the latest version of the vscode-python plugin
2. Debugging Python files

Review checklist

• as an author, I have thoroughly tested my changes and carefully followed the review guidelines

Since I only know that the vscode-python plugin uses related APIs, I have not tested the performance of other plugins.

Reminder for reviewers

• as a reviewer, I agree to behave in accordance with the review guidelines

[akosyakov]

I was able to verify that debugging with latest version of vscode-python does not work on master, but works with this PR:

• ext install ms-python.python - to install latest extension
• Launch configuration:

    {
      "name": "Python: Current File",
      "type": "python",
      "request": "launch",
      "program": "${file}",
      "console": "internalConsole",
      "internalConsoleOptions": "openOnSessionStart"
    }

• Test file:

x = 1
if x == 1:
    # indented four spaces
    print("x is 1.")

BTW I've noticed that we also missing workspaceFolder attribute on DebugSession. Please file a a follow-up issue we have to complete this api.

[BroKun]

I added #6385 @akosyakov

[BroKun]

There is nothing left, could I operate the merger myself? @akosyakov

[akosyakov]

@BroKun yes, sure, you are committer