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/plugins/t/qc_info.test

@@ -4,8 +4,10 @@ set @save_query_cache_size=@@global.query_cache_size;
 
 # test that hits are correctly incremented
 reset query cache;
+--disable_ps2_protocol
 select * from t1;
 select * from t1;
+--enable_ps2_protocol
 select hits, statement_text from information_schema.query_cache_info;
 
 drop table t1;

mysql-test/suite/plugins/t/qc_info_init.inc

@@ -9,7 +9,9 @@ set global query_cache_size=1355776;
 
 create table t1 (a int not null);
 insert into t1 values (1),(2),(3);
+--disable_ps2_protocol
 select * from t1;
+--enable_ps2_protocol
 select statement_schema, statement_text, result_blocks_count, result_blocks_size from information_schema.query_cache_info;
 
 select @@time_zone into @time_zone;
@@ -25,7 +27,9 @@ select @@group_concat_max_len into @group_concat_max_len;
 select Name into @new_time_zone from mysql.time_zone_name limit 1;
 set time_zone=@new_time_zone,default_week_format=4,character_set_client='binary',character_set_results='utf32',collation_connection='utf32_bin',sql_mode='STRICT_ALL_TABLES',div_precision_increment=7,lc_time_names='ar_SD',autocommit=0, group_concat_max_len=513, max_sort_length=1011;
 --disable_result_log
+--disable_ps2_protocol
 select * from t1;
+--enable_ps2_protocol
 --enable_result_log
 set time_zone= @time_zone, default_week_format= @default_week_format, character_set_client= @character_set_client,character_set_results= @character_set_results, sql_mode= @sql_mode, div_precision_increment= @div_precision_increment, lc_time_names= @lc_time_names, autocommit= @autocommit, group_concat_max_len= @group_concat_max_len, max_sort_length= @max_sort_length;
 

mysql-test/suite/plugins/t/server_audit.test

@@ -5,6 +5,7 @@ if (!$SERVER_AUDIT_SO) {
   skip No SERVER_AUDIT plugin;
 }
 
+--disable_ps2_protocol
 # An unfortunate wait for check-testcase.test to complete disconnect.
 let count_sessions= 1;
 source include/wait_until_count_sessions.inc;
@@ -234,6 +235,7 @@ uninstall plugin server_audit;
 --replace_regex /[0-9]* [0-9][0-9]:[0-9][0-9]:[0-9][0-9]\,[^,]*\,/TIME,HOSTNAME,/ /\,[1-9][0-9]*\,/,1,/ /\,[1-9][0-9]*/,ID/
 cat_file $MYSQLD_DATADIR/server_audit.log;
 remove_file $MYSQLD_DATADIR/server_audit.log;
+--enable_ps2_protocol
 
 --echo #
 --echo # MDEV-27631 Assertion `global_status_var.global_memory_used == 0' failed in mysqld_exit

mysql-test/suite/plugins/t/show_all_plugins.test

@@ -12,7 +12,9 @@ show status like '%libraries%';
 #show status like '%libraries%';
 --replace_result .dll .so
 --replace_column 5 MYSQL_VERSION_ID
+--disable_ps2_protocol
 eval select * from information_schema.all_plugins where plugin_library='$HA_EXAMPLE_SO';
+--enable_ps2_protocol
 show status like '%libraries%';
 --sorted_result
 --replace_result .dll .so

mysql-test/suite/plugins/t/thread_pool_server_audit.test

@@ -7,6 +7,7 @@ if (!$SERVER_AUDIT_SO) {
 
 install plugin server_audit soname 'server_audit';
 
+--disable_ps2_protocol
 show variables like 'server_audit%';
 set global server_audit_file_path=null;
 set global server_audit_incl_users=null;
@@ -140,6 +141,7 @@ set global server_audit_file_path='nonexisting_dir/';
 show status like 'server_audit_current_log';
 show variables like 'server_audit%';
 uninstall plugin server_audit;
+--enable_ps2_protocol
 
 let $MYSQLD_DATADIR= `SELECT @@datadir`;
 # replace the timestamp and the hostname with constant values