Merge branch '346786-finalize_background_migration' into 'master'

Finalize backfilling ci mirror tables

See merge request gitlab-org/gitlab!79344

db/post_migrate/20220127132200_cleanup_backfill_ci_namespace_mirrors.rb

+# frozen_string_literal: true
+
+class CleanupBackfillCiNamespaceMirrors < Gitlab::Database::Migration[1.0]
+  MIGRATION = 'BackfillCiNamespaceMirrors'
+
+  disable_ddl_transaction!
+
+  def up
+    finalize_background_migration(MIGRATION)
+  end
+
+  def down
+    # no-op
+  end
+end

db/post_migrate/20220127132201_cleanup_backfill_ci_project_mirrors.rb

+# frozen_string_literal: true
+
+class CleanupBackfillCiProjectMirrors < Gitlab::Database::Migration[1.0]
+  MIGRATION = 'BackfillCiProjectMirrors'
+
+  disable_ddl_transaction!
+
+  def up
+    finalize_background_migration(MIGRATION)
+  end
+
+  def down
+    # no-op
+  end
+end

db/schema_migrations/20220127132200

+394f1fa34ccf9188f25102ac963829ebee07dddaf02f1d5958ec14d701fb6fe8
\ No newline at end of file

db/schema_migrations/20220127132201

+f8ce7c183352ce08585eda83eb1e22c800b1b2044b93bc11858a74a8bd9a99d4
\ No newline at end of file