pip_library workaround breaks on Debian 12

[chrisnovakovic]

The version of pip in Debian 12's python3-pip package removes the --system option, so pip_library no longer works:

$ plz build //third_party/python:colorama
Build stopped after 490ms. 1 target failed:
    //third_party/python:_colorama#srcs
Error building target //third_party/python:_colorama#srcs: exit status 2

Usage:
  /usr/bin/python3 -m pip install [options] <requirement specifier> [package-index-options] ...
  /usr/bin/python3 -m pip install [options] -r <requirements file> [package-index-options] ...
  /usr/bin/python3 -m pip install [options] [-e] <vcs project url> ...
  /usr/bin/python3 -m pip install [options] [-e] <local project path> ...
  /usr/bin/python3 -m pip install [options] <archive url/path> ...

no such option: --system