uv python install consumes a lot of memory #10060
Description
While investigating #10057 and rerunning the uv python install command to get a shorter test case I noticed uv became slower and slower the more I used it. It seems to read and rewrite a _sysconfigdata__linux_x86_64-linux-gnu.py file which keeps getting bigger and bigger for every run.
$ uv --version
uv 0.5.11
$ uv python uninstall --all
Searching for Python installations
No Python installations found
$ time (for i in {1..25}; do uv python install 3.12.8; done)
Installed Python 3.12.8 in 1.06s
+ cpython-3.12.8-linux-x86_64-gnu
real 0m27.687s
user 0m17.309s
sys 0m8.580s
$ cd /home/jon/.local/share/uv/python/cpython-3.12.8-linux-x86_64-gnu/lib/python3.12/
$ du -hs _sysconfigdata__linux_x86_64-linux-gnu.py
2.3G _sysconfigdata__linux_x86_64-linux-gnu.py