Merge branch 'feature/gpg-verification-status-remove-ignore-rule' into 'master'

Remove ignore rule for GpgSignature#valid_signature

See merge request !14050

app/models/gpg_signature.rb

 class GpgSignature < ActiveRecord::Base
   include ShaAttribute
-  include IgnorableColumn
-
-  ignore_column :valid_signature
 
   sha_attribute :commit_sha
   sha_attribute :gpg_key_primary_keyid