Apply changes from update-java-client-version to Spark 4.0

- NodeClient: Remove custom connection timeouts and pool settings
- NodeClient: Rename clientV2 to client for consistency
- NodeClient: Use IOUtils.toByteArray() instead of Stream-based byte reading
- TPCDSClusterSuite: Add logging to track table processing time

These changes align with the update-java-client-version branch while
preserving Spark 4.0 support.

Author: ShimonSte

spark-4.0/clickhouse-spark-it/src/test/scala/org/apache/spark/sql/clickhouse/cluster/TPCDSClusterSuite.scala

@@ -38,6 +38,8 @@ class TPCDSClusterSuite extends SparkClickHouseClusterTest {
       spark.sql("CREATE DATABASE tpcds_sf1_cluster WITH DBPROPERTIES (cluster = 'single_replica')")
 
       TPCDSTestUtils.tablePrimaryKeys.foreach { case (table, primaryKeys) =>
+        println(s"before table ${table} ${primaryKeys}")
+        val start: Long = System.currentTimeMillis()
         spark.sql(
           s"""
              |CREATE TABLE tpcds_sf1_cluster.$table
@@ -51,9 +53,11 @@ class TPCDSClusterSuite extends SparkClickHouseClusterTest {
              |SELECT * FROM tpcds.sf1.$table;
              |""".stripMargin
         )
+        println(s"time took  table ${table} ${System.currentTimeMillis() - start}")
       }
 
       TPCDSTestUtils.tablePrimaryKeys.keys.foreach { table =>
+        println(s"table ${table}")
         assert(spark.table(s"tpcds.sf1.$table").count === spark.table(s"tpcds_sf1_cluster.$table").count)
       }
     }