fix: use min instead of max when capping write buffer size to Int range (#3914)

COMET_SHUFFLE_WRITE_BUFFER_SIZE is a Long (bytesConf) but the protobuf
field is int32, so the value must be capped at Int.MaxValue. The code
used .max(Int.MaxValue) which always returns Int.MaxValue (~2GB)
regardless of the configured value. Should be .min(Int.MaxValue) to
preserve smaller values while capping at the Int range.

Author: andygrove

spark/src/main/scala/org/apache/spark/sql/comet/execution/shuffle/CometNativeShuffleWriter.scala

@@ -191,7 +191,7 @@ class CometNativeShuffleWriter[K, V](
       shuffleWriterBuilder.setCompressionLevel(
         CometConf.COMET_EXEC_SHUFFLE_COMPRESSION_ZSTD_LEVEL.get)
       shuffleWriterBuilder.setWriteBufferSize(
-        CometConf.COMET_SHUFFLE_WRITE_BUFFER_SIZE.get().max(Int.MaxValue).toInt)
+        CometConf.COMET_SHUFFLE_WRITE_BUFFER_SIZE.get().min(Int.MaxValue).toInt)
 
       outputPartitioning match {
         case p if isSinglePartitioning(p) =>