Use proxy auth from the Remote config

https://pulp.plan.io/issues/9390
closes #9390

(cherry picked from commit f97df48)

CHANGES/9390.bugfix

@@ -0,0 +1 @@
+Use proxy auth credentials of a Remote when syncing content.

pulp_ansible/app/downloaders.py

@@ -130,7 +130,9 @@ async def _run_with_additional_headers(self, headers):
                  more information.
         """
         await asyncio.sleep(0.75)
-        async with self.session.get(self.url, headers=headers, proxy=self.proxy) as response:
+        async with self.session.get(
+            self.url, headers=headers, proxy=self.proxy, proxy_auth=self.proxy_auth, auth=self.auth
+        ) as response:
             self.raise_for_status(response)
             to_return = await self._handle_response(response)
             await response.release()
@@ -159,7 +161,12 @@ async def get_or_update_token(self):
             }
             url = self.ansible_auth_url
             async with self.session.post(
-                url, data=form_payload, proxy=self.proxy, raise_for_status=True
+                url,
+                data=form_payload,
+                proxy=self.proxy,
+                proxy_auth=self.proxy_auth,
+                auth=self.auth,
+                raise_for_status=True,
             ) as response:
                 token_data = await response.text()