Compare major-minor specifiers when filtering interpreters (#11952)
## Summary
If we're looking at (e.g.) `python3.12`, and we have a `requires-python:
">=3.12.7, <3.13"`, then checking if the range includes `3.12` will
return `false`. Instead, we need to look at the lower- and upper-bound
major-minors of the `requires-python`.
Closes https://github.com/astral-sh/uv/issues/11825.
