perf: compute output_bytes without building ArrayData

Closes #26071

`BaselineMetrics::record_output` called `get_record_batch_memory_size`
for every output batch, which materializes `ArrayData` and inserts every
buffer address into a hash set. Compute `output_bytes` as the sum of
each
column's `Array::get_array_memory_size` instead, which never builds
`ArrayData`.

`get_record_batch_memory_size` is unchanged and remains what memory
reservations use, since those need exact deduplicated accounting.

Author: minhh-nguyen

datafusion/physical-expr-common/src/metrics/baseline.rs

@@ -359,7 +359,7 @@ impl RecordOutput for RecordBatch {
 impl RecordOutput for &RecordBatch {
     fn record_output(self, bm: &BaselineMetrics) -> Self {
         bm.record_output(self.num_rows());
-        bm.output_bytes.add(output_bytes(&self));
+        bm.output_bytes.add(output_bytes(self));
         bm.output_batches.add(1);
         self
     }