use RecordBatchTransformerBuilder instead of RecordBatchTransformer (#1857)

## Which issue does this PR close?

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- Closes #.

## What changes are included in this PR?
This should fix CI, currently broken with
```
795 |             RecordBatchTransformer::build(snapshot_schema, &projected_iceberg_field_ids);
    |                                     ^^^^^ function or associated item not found in `RecordBatchTransformer`
```

Likely due to merge conflict between
https://github.com/apache/iceberg-rust/pull/1847/files#diff-640415fbb0b37eac6f774eff524fb364c4e54c02da3a3c0e355af5caa941007cR637
and
https://github.com/apache/iceberg-rust/pull/1821/files#diff-640415fbb0b37eac6f774eff524fb364c4e54c02da3a3c0e355af5caa941007cR149

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## Are these changes tested?

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Author: kevinjqliu

crates/iceberg/src/arrow/record_batch_transformer.rs

@@ -792,7 +792,8 @@ mod test {
         let projected_iceberg_field_ids = [1, 2, 3];
 
         let mut transformer =
-            RecordBatchTransformer::build(snapshot_schema, &projected_iceberg_field_ids);
+            RecordBatchTransformerBuilder::new(snapshot_schema, &projected_iceberg_field_ids)
+                .build();
 
         let file_schema = Arc::new(ArrowSchema::new(vec![
             simple_field("id", DataType::Int32, false, "1"),