MDEV-31003: Second execution for ps-protocol

This patch adds for "--ps-protocol" second execution
of queries "SELECT".
Also in this patch it is added ability to disable/enable
(--disable_ps2_protocol/--enable_ps2_protocol) second
execution for "--ps-prototocol" in testcases.

mysql-test/suite/rpl/t/rpl_loaddata_map.test

@@ -37,7 +37,9 @@ while($rows)
   eval insert into t1 values (null);
   dec $rows;
 }
+--disable_ps2_protocol
 eval select * into outfile '$MYSQLTEST_VARDIR/tmp/bug30435_5k.txt' from t1;
+--enable_ps2_protocol
 
 DROP TABLE t1;
 SET @@sql_log_bin= 1;