tasks: Revert task renaming introduced in 0f1d1d54

Renaming the celery task broke the subversion loading in production as the
load-svn task type is already registered in scheduler database and targets
the previous celery task name.

Related to swh-environment#3925.

swh/loader/svn/tasks.py

@@ -18,7 +18,7 @@ def _process_kwargs(kwargs):
     return kwargs
 
 
-@shared_task(name=__name__ + ".SvnLoaderFromRemoteDump")
+@shared_task(name=__name__ + ".DumpMountAndLoadSvnRepository")
 def load_svn(**kwargs):
     """
     1. Mount a remote svn dump as a local svn repository.

swh/loader/svn/tests/test_task.py

@@ -28,7 +28,7 @@ def test_svn_loader_from_remote_dump_for_listed_origin(
 
     loading_task_creation_for_listed_origin_test(
         loader_class_name=f"{NAMESPACE}.loader.SvnLoaderFromRemoteDump",
-        task_function_name=f"{NAMESPACE}.tasks.SvnLoaderFromRemoteDump",
+        task_function_name=f"{NAMESPACE}.tasks.DumpMountAndLoadSvnRepository",
         lister=svn_lister,
         listed_origin=svn_listed_origin,
     )