fix: avoid fan-out DeletePrefix calls for batch-expire and ILM (#19365)

cmd/batch-expire.go

@@ -428,7 +428,8 @@ func batchObjsForDelete(ctx context.Context, r *BatchJobExpire, ri *batchJobInfo
 					}
 					stopFn := globalBatchJobsMetrics.trace(batchJobMetricExpire, ri.JobID, attempts)
 					_, err := api.DeleteObject(ctx, exp.Bucket, encodeDirObject(exp.Name), ObjectOptions{
-						DeletePrefix: true,
+						DeletePrefix:       true,
+						DeletePrefixObject: true, // use prefix delete on exact object (this is an optimization to avoid fan-out calls)
 					})
 					if err != nil {
 						stopFn(exp, err)