Geo log message shouldn't use full path

Replaced with shard name, and disk_path, the combination gives enough
details.

Closes https://gitlab.com/gitlab-org/gitaly/issues/1242

ee/app/services/geo/repository_verify_secondary_service.rb

@@ -69,7 +69,11 @@ module Geo
       }
 
       if failure
-        log_error(failure, exception, type: type, repository_full_path: repository.path_to_repo)
+        log_error(failure, exception,
+                  type: type,
+                  repository_shard: project.repository_storage,
+                  repsitory_disk_path: repository.disk_path
+                 )
       end
 
       registry.update!(attrs)