feat: run notebooks in data service (#375)

Co-authored-by: Samuel Gaist <samuel.gaist@idiap.ch>

squashme: resolve package version conflicts

Author: olevski

components/renku_data_services/notebooks/api/classes/k8s_client.py

@@ -487,10 +487,9 @@ async def delete_server(self, server_name: str, safe_username: str) -> None:
         """Delete the server."""
         server = await self.get_server(server_name, safe_username)
         if not server:
-            raise MissingResourceError(
-                f"Cannot find server {server_name} for user " f"{safe_username} in order to delete it."
-            )
-        return await self.renku_ns_client.delete_server(server_name)
+            return None
+        await self.renku_ns_client.delete_server(server_name)
+        return None
 
     async def patch_tokens(self, server_name: str, renku_tokens: RenkuTokens, gitlab_token: GitlabToken) -> None:
         """Patch the Renku and Gitlab access tokens used in a session."""