refactor: Drop col 'package_name_pattern_ilike_query' Part 3

This MR includes:
- Dropping the column 'package_name_pattern_ilike_query'
  because it this column is not needed anymore
- Changes for the 2nd part for dropping a column based
  on the GitLab guide, see
    https://docs.gitlab.com/ee/development/database/avoiding_downtime_in_migrations.html#dropping-columns
- Changes relevant for protected packages

Changelog: removed

app/models/packages/protection/rule.rb

@@ -3,9 +3,6 @@
 module Packages
   module Protection
     class Rule < ApplicationRecord
-      include IgnorableColumns
-      ignore_column :package_name_pattern_ilike_query, remove_with: '16.11', remove_after: '2024-03-22'
-
       enum package_type: Packages::Package.package_types.slice(:npm)
       enum push_protected_up_to_access_level:
              Gitlab::Access.sym_options_with_owner.slice(:developer, :maintainer, :owner),