Remove finalized BBM that contains cross join sec decomp can't support

...round_migrations/backfill_finding_initial_pipeline_id.yml

...40514030609_queue_backfill_finding_initial_pipeline_id.rb

...09060152_finalize_backfill_finding_initial_pipeline_id.rb

...20240724182445_update_finish_status_for_bbm_migrations.rb

db/schema_migrations/20240514030609

db/schema_migrations/20240709060152

...kground_migration/backfill_finding_initial_pipeline_id.rb

...nd_migration/backfill_finding_initial_pipeline_id_spec.rb

...030609_queue_backfill_finding_initial_pipeline_id_spec.rb