Refactor skippable? as registry_exists?

Relates to https://gitlab.com/gitlab-org/gitlab/issues/232516

ee/lib/gitlab/geo/log_cursor/events/base_event.rb

@@ -23,7 +23,7 @@ module Gitlab
           end
           # rubocop: enable CodeReuse/ActiveRecord
 
-          def skippable?
+          def registry_exists?
             registry.new_record?
           end
 

ee/lib/gitlab/geo/log_cursor/events/cache_invalidation_event.rb

@@ -23,11 +23,11 @@ module Gitlab
               'Cache invalidation',
               cache_key: event.key,
               cache_expired: expired,
-              skippable: skippable?
+              skippable: registry_exists?
             )
           end
 
-          def skippable?
+          def registry_exists?
             false
           end
         end

ee/lib/gitlab/geo/log_cursor/events/hashed_storage_migrated_event.rb

@@ -10,7 +10,7 @@ module Gitlab
           def process
             return unless event.project_id
 
-            job_id = hashed_storage_migrate unless skippable?
+            job_id = hashed_storage_migrate unless registry_exists?
             log_event(job_id)
           end
 
@@ -34,7 +34,7 @@ module Gitlab
                 new_storage_version: event.new_storage_version,
                 old_disk_path: event.old_disk_path,
                 new_disk_path: event.new_disk_path,
-                skippable: skippable?,
+                skippable: registry_exists?,
                 job_id: job_id)
           end
         end

ee/lib/gitlab/geo/log_cursor/events/repository_deleted_event.rb

@@ -10,7 +10,7 @@ module Gitlab
           def process
             job_id = nil
 
-            unless skippable?
+            unless registry_exists?
               job_id = destroy_repository
             end
 
@@ -35,7 +35,7 @@ module Gitlab
               project_id: event.project_id,
               repository_storage_name: event.repository_storage_name,
               disk_path: event.deleted_path,
-              skippable: skippable?,
+              skippable: registry_exists?,
               job_id: job_id)
           end
         end

ee/lib/gitlab/geo/log_cursor/events/repository_renamed_event.rb

@@ -10,7 +10,7 @@ module Gitlab
           def process
             return unless event.project_id
 
-            job_id = rename_repository unless skippable?
+            job_id = rename_repository unless registry_exists?
             log_event(job_id)
           end
 
@@ -31,7 +31,7 @@ module Gitlab
               project_id: event.project_id,
               old_path: event.old_path_with_namespace,
               new_path: event.new_path_with_namespace,
-              skippable: skippable?,
+              skippable: registry_exists?,
               job_id: job_id)
           end
         end

ee/lib/gitlab/geo/log_cursor/events/reset_checksum_event.rb

@@ -8,12 +8,12 @@ module Gitlab
           include BaseEvent
 
           def process
-            registry.reset_checksum! unless skippable?
+            registry.reset_checksum! unless registry_exists?
 
             log_event(
               'Reset checksum',
               project_id: event.project_id,
-              skippable: skippable?)
+              skippable: registry_exists?)
           end
         end
       end