Cleanup: addon, sort import-like code

Sort the `... = object` assignments that mimick the imports done when
mypy is doing its typechecking.

addon/flamenco/job_types.py

@@ -20,10 +20,10 @@ if TYPE_CHECKING:
     )
 else:
     _ApiClient = object
-    _AvailableJobTypes = object
     _AvailableJobType = object
-    _SubmittedJob = object
+    _AvailableJobTypes = object
     _JobSettings = object
+    _SubmittedJob = object
 
 _available_job_types: Optional[list[_AvailableJobType]] = None