Fix broken uninstallation by a bogus downstream patch

In pip 21.2, the Distribution here is a wrapper around the regular Distribution.
It has a limited set of API defined by the BaseDistribution protocol.
dist_location() uses the project_name attribute under the hood --
and that is not part of the API.

If we ever upstream this, we should make this check a property of BaseDistribution.
But, for now, we hotfix it by accessing the private wrapped Distribution object directly.
Yes, this is ugly.

python-pip.spec

@@ -22,7 +22,7 @@
 
 Name:           python-%{srcname}
 Version:        %{base_version}%{?prerel:~%{prerel}}
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        A tool for installing and managing Python packages
 
 # We bundle a lot of libraries with pip, which itself is under MIT license.
@@ -391,6 +391,9 @@ pytest_k='not completion and
 %{python_wheeldir}/%{python_wheelname}
 
 %changelog
+* Mon Aug 16 2021 Miro Hrončok <mhroncok@redhat.com> - 21.2.3-2
+- Fix broken uninstallation by a bogus downstream patch
+
 * Mon Aug 09 2021 Miro Hrončok <mhroncok@redhat.com> - 21.2.3-1
 - Update to 21.2.3
 - Resolves: rhbz#1985635