Add the api_client into the sync_repo task

This is required for .com

Author: ericholscher

readthedocs/projects/tasks/builds.py

@@ -209,6 +209,9 @@ def execute(self):
             environment={
                 "GIT_TERMINAL_PROMPT": "0",
             },
+            # Pass the api_client so that all environments have it.
+            # This is needed for ``readthedocs-corporate``.
+            api_client=self.data.api_client,
             # Do not try to save commands on the db because they are just for
             # sync repository
             record=False,