Move Metrics/AbcSize into separate TODO file

.rubocop_todo.yml

@@ -125,11 +125,6 @@ Lint/StructNewOverride:
 Lint/UselessMethodDefinition:
   Enabled: false
 
-# Offense count: 5
-# Configuration parameters: IgnoredMethods.
-Metrics/AbcSize:
-  Max: 61
-
 # Offense count: 13
 # Configuration parameters: IgnoredMethods.
 Metrics/CyclomaticComplexity:

.rubocop_todo/metrics/abc_size.yml

+---
+Metrics/AbcSize:
+  Exclude:
+    - 'app/controllers/concerns/issuable_actions.rb'
+    - 'app/helpers/issuables_helper.rb'
+    - 'app/helpers/nav/top_nav_helper.rb'
+    - 'app/helpers/search_helper.rb'
+    - 'app/models/instance_configuration.rb'
+    - 'app/services/projects/create_service.rb'
+    - 'ee/app/workers/elastic/migration_worker.rb'
+    - 'ee/lib/ee/audit/project_changes_auditor.rb'
+    - 'lib/gitlab/analytics/cycle_analytics/request_params.rb'
+    - 'lib/gitlab/sidekiq_middleware/server_metrics.rb'
+    - 'qa/qa/resource/repository/push.rb'