Merge branch 'tchu-bump-obsolete-migration-keep-required-stop' into 'master'

Bump obsolete search migration keep milestone to 17.3

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/169297



Merged-by: Terri Chu <tchu@gitlab.com>
Approved-by: Ravi Kumar <rkumar@gitlab.com>

keeps/mark_old_advanced_search_migrations_as_obsolete.rb

@@ -16,7 +16,9 @@ module Keeps
   #   -k Keeps::MarkOldAdvancedSearchMigrationsAsObsolete
   # ```
   class MarkOldAdvancedSearchMigrationsAsObsolete < ::Gitlab::Housekeeper::Keep
-    CUTOFF_MILESTONE = '16.11' # Only obsolete migrations added before this
+    # Only obsolete migrations added before this
+    # milestones are stored in config/upgrade_path.yml
+    CUTOFF_MILESTONE = '17.3'
     MIGRATIONS_PATH = 'ee/elastic/migrate'
     MIGRATION_REGEXP = /\A([0-9]+)_([_a-z0-9]*)\.rb\z/