Include pre-release versions in `uv python install --reinstall` (#13645)
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## Summary
<!-- What's the purpose of the change? What does it do, and why? -->
This change allows for `uv python install --reinstall` to include
pre-releases when reinstalling. It does this by explicitly allowing
pre-releases to be included within `PythonRequest::Any` if the user does
not specify a version to reinstall.
Fixes #13582
## Test Plan
<!-- How was it tested? -->
```bash
uv python install 3.14 3.13 3.10
uv python install --no-config --reinstall
```