Housekeeper for search migrations should remove traits from specs

The elastic and sidekiq_inline traits should not be needed when a migration is obsolete. They can be removed by the MarkOldAdvancedSearchMigrationsAsObsolete housekeeper keep

The following discussion from !150553 (merged) should be addressed:

• @maddievn started a discussion: (+1 comment)

  As a follow we could set the trait to :elastic_delete_by_query so that we don't have unnecessary :elastic_clean or :elastic