[GR-70879] Ensurepip should not patch pip.

PullRequest: graalpython/4061

Author: steve-s

graalpython/lib-python/3/ensurepip/__init__.py

@@ -118,6 +118,8 @@ def _disable_pip_configuration_settings():
     # We also ignore the settings in the default pip configuration file
     # See http://bugs.python.org/issue20053 for details
     os.environ['PIP_CONFIG_FILE'] = os.devnull
+    # GraalPy patch: disable patching
+    os.environ['PIP_GRAALPY_DISABLE_PATCHING']='true'
 
 
 def bootstrap(*, root=None, upgrade=False, user=False,