Decrease batch size to 10 in test output migration (Kitware#2975)

A batch size of 5000 proved to be too large for this migration in
real-world testing.

Author: williamjallen

database/migrations/2025_06_16_152800_decompress_test_output.php

@@ -10,7 +10,7 @@ public function up(): void
 
         $max_id = 0;
         while (true) {
-            $batch_size = 5000;
+            $batch_size = 10;
             $batch = DB::select("
                 SELECT
                     id,