Merge branch '345537-skip-ee-migration' into 'master'

Skip EE only migrations UpdateVulnerabilityOccurrencesLocation for FOSS

See merge request gitlab-org/gitlab!74328

db/post_migrate/20211102114802_update_vulnerability_occurrences_location.rb

@@ -8,6 +8,8 @@ class UpdateVulnerabilityOccurrencesLocation < Gitlab::Database::Migration[1.0]
   disable_ddl_transaction!
 
   def up
+    return unless Gitlab.ee?
+
     relation = Gitlab::BackgroundMigration::UpdateVulnerabilityOccurrencesLocation::Occurrence.where(location: nil)
     queue_background_migration_jobs_by_range_at_intervals(relation,
                                                           MIGRATION_NAME,