Use quickpick details for Use Python from `python.defaultInterpreterPath` setting entry

[eamodio]

Testing #17070

IMO, the "Use Python from python.defaultInterpreterPath setting" entry should have the path in the quick pick detail area rather than description, like the other entries

[kimadeline]

Verification steps:

1. Activate the Python extension
2. Set the value of the python.defaultInterpreterPath setting to a Python path (example: /usr/bin/python3)
3. Open the interpreter quickpick, either with the Python: Select Interpreter command or by clicking the interpreter in the bottom left of the status bar
4. Check that the Python path for the "Use Python from python.defaultInterpreterPath setting" entry is in an entry detail on its own line (same as all other entries) instead of an inline description

[rchiodo]

/verified. I get this: