ESQL: FIx Driver creating status with a live list of operators

Author: ivancea

x-pack/plugin/esql/compute/src/main/java/org/elasticsearch/compute/operator/Driver.java

@@ -556,7 +556,7 @@ private void updateStatus(long extraCpuNanos, int extraIterations, DriverStatus.
                 prev.cpuNanos() + extraCpuNanos,
                 prev.iterations() + extraIterations,
                 status,
-                statusOfCompletedOperators,
+                new ArrayList<>(statusOfCompletedOperators),
                 activeOperators.stream().map(op -> new OperatorStatus(op.toString(), op.status())).toList(),
                 sleeps
             );