component/python3: Ensure pip/setuptools installation

- Add post-install steps for pip bootstrap
- Python 3.12 doesn't provide setuptools by default,
  add the setuptool and set the version 68.0.0

component/python3/buildout.cfg

@@ -95,3 +95,7 @@ pre-configure =
 version = 3.12
 package_version = 3.12.7
 md5sum = c6c933c1a0db52597cb45a7910490f93
+location = @@LOCATION@@
+post-install =
+  ${:location}/bin/python3 -m ensurepip
+  ${:location}/bin/python3 -m pip install --upgrade pip setuptools==68.0.0