Fixes the outdated description of Key Generation and Hadoop in HiveServer2 integration doc

[linghengqian]

For #29052.

Changes proposed in this pull request:

• Fixes the outdated description of Key Generation and Hadoop in HiveServer2 integration doc. Also for Adds documentation for HiveServer2 support #33717 .
• Fix documentation on incorrect description of key generation using shardingsphere under HiveServer2. This seems to be fixed in an unknown commit.
• Fix documentation on incorrect description of Hadoop version. HiveServer2 4.0.1 fixes the bug that HiveServer2 4.0.0 needs to introduce an additional org.apache.hadoop:hadoop-client-api:3.3.6. See HIVE-28315: Missing classes while using hive jdbc standalone jar hive#5313 and Bump base HiveServer2 JDBC Driver version to 4.0.1 linghengqian/hive-server2-jdbc-driver#10 .
• Modify nativeTest's use of h2database one-time connections to align with h2database's documentation examples. See https://h2database.com/html/quickstart.html.
• As a follow-up to org.apache.shardingsphere.sharding.route.strategy.type.standard.StandardShardingStrategy.doSharding, Is it possible to not check whether the table name returned by the sharding algorithm is in availableTableNames? #32742, all actualDataNodes in nativeTest have been explicitly configured, because implicit configuration is not intuitive.
• Even though the iceberg table format supports transactions, hiveserver2 doesn't seem to care about this at all. And the transaction rollback syntax of iceberg is completely different from other databases. See https://iceberg.apache.org/docs/latest/hive/#table-rollback and org.apache.hive.jdbc.HiveConnection#rollback(). Hive's handling is a bit humorous.

/*
   * (non-Javadoc)
   *
   * @see java.sql.Connection#rollback()
   */

  @Override
  public void rollback() throws SQLException {
    // TODO Auto-generated method stub
    throw new SQLFeatureNotSupportedException("Method not supported");
  }

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