Reorder runners backfill migrations

It ensures that the runners are copied to the new
table before we copy the taggings.

Changelog: fixed

db/docs/batched_background_migrations/backfill_ci_runners_partitioned_table.yml

@@ -4,5 +4,5 @@ description: This migration copies runners from ci_runners to the new partitione
 feature_category: runner
 introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/166520
 milestone: '17.8'
-queued_migration_version: 20250103092422
+queued_migration_version: 20241219100359
 finalized_by: 20250113151324

db/docs/batched_background_migrations/copy_runner_taggings.yml

@@ -4,5 +4,5 @@ description: Copy taggings data for the ci_runners table into the new sharded ci
 feature_category: runner
 introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/175578
 milestone: '17.8'
-queued_migration_version: 20241219100359
+queued_migration_version: 20250103092422
 finalized_by: 20250114135714