meson.recipe: Forcibly install script to prefix/bin

Some distros have changed the default sysconfig scheme to manually add
'local' to all install dirs for setuptools. Reverting this is far too
much work and will be fragile as heck, so just accept it and move on.

Fedora: https://src.fedoraproject.org/rpms/python3.10/blob/f36/f/00251-change-user-install-location.patch

Debian: https://salsa.debian.org/cpython-team/python3/-/blob/3.10.4-4/debian/patches/sysconfig-debian-schemes.diff

The workaround is to force the script to be installed in prefix/bin,
which also fixes things on Windows where it's usually installed to
prefix/Scripts

Part-of: <gstreamer/cerbero!861>
13 jobs for !861 with fix-python-install-py10-f36-debian
merge request