Fix legacy TAP tests: clickhouse_php_conn and reg_test_3317

- clickhouse_php_conn-t.php: Fix deprecated ClickHouse MergeTree syntax
  Change from deprecated ENGINE=MergeTree(EventDate, (EventDate), 8192)
  to new syntax ENGINE=MergeTree() ORDER BY (EventDate)

- reg_test_3317-lock_hostgroup_special_queries-t.cpp: Add query annotations
  Add /* ;hostgroup=1300 */ hints to SELECT statements to ensure proper
  routing when connection is locked to hostgroup 1300

test/tap/tests/clickhouse_php_conn-t.php

@@ -89,7 +89,7 @@ if ($port !== 6090) {
 	$proxy->query("CREATE DATABASE IF NOT EXISTS test");
 	$proxy->query("USE test");
 	$proxy->query("DROP TABLE IF EXISTS types_table");
-	$proxy->query("CREATE TABLE IF NOT EXISTS types_table (EventDate DATE, DateTime DATETIME, col1 UInt8, col2 Int16, col3 Int32, col4 Int64, col5 Nullable(Float32), col6 Float64, col7 Decimal64(3)) ENGINE=MergeTree(EventDate, (EventDate), 8192)");
+	$proxy->query("CREATE TABLE IF NOT EXISTS types_table (EventDate DATE, DateTime DATETIME, col1 UInt8, col2 Int16, col3 Int32, col4 Int64, col5 Nullable(Float32), col6 Float64, col7 Decimal64(3)) ENGINE=MergeTree() ORDER BY (EventDate)");
 }
 
 $shortName = exec('date +%Z');

test/tap/tests/reg_test_3317-lock_hostgroup_special_queries-t.cpp

@@ -34,7 +34,7 @@ void check_set_names(MYSQL* proxysql_mysql) {
 		return;
 	}
 
-	query_res = mysql_query(proxysql_mysql, "SELECT @@character_set_client, @@character_set_results, @@character_set_connection");
+	query_res = mysql_query(proxysql_mysql, "SELECT /* ;hostgroup=1300 */ @@character_set_client, @@character_set_results, @@character_set_connection");
 	if (query_res) {
 		diag("Query failed with error: %s", mysql_error(proxysql_mysql));
 		return;
@@ -78,7 +78,7 @@ void check_set_names(MYSQL* proxysql_mysql) {
  * @param proxysql_mysql A MYSQL handle to an already stablished MySQL connection.
  */
 void check_autocommit(MYSQL* proxysql_mysql) {
-	int query_res = mysql_query(proxysql_mysql, "SELECT @@autocommit");
+	int query_res = mysql_query(proxysql_mysql, "SELECT /* ;hostgroup=1300 */ @@autocommit");
 	if (query_res) {
 		diag("Query failed with error: %s", mysql_error(proxysql_mysql));
 		return;
@@ -105,7 +105,7 @@ void check_autocommit(MYSQL* proxysql_mysql) {
 	}
 
 	// Check new status on @@autocommit
-	query_res = mysql_query(proxysql_mysql, "SELECT @@autocommit");
+	query_res = mysql_query(proxysql_mysql, "SELECT /* ;hostgroup=1300 */ @@autocommit");
 	if (query_res) {
 		diag("Query failed with error: %s", mysql_error(proxysql_mysql));
 		return;
@@ -140,7 +140,7 @@ void check_session_character_set_server(MYSQL* proxysql_mysql) {
 		return;
 	}
 
-	query_res = mysql_query(proxysql_mysql, "SELECT @@character_set_server");
+	query_res = mysql_query(proxysql_mysql, "SELECT /* ;hostgroup=1300 */ @@character_set_server");
 	if (query_res) {
 		diag("Query failed with error: %s", mysql_error(proxysql_mysql));
 		return;
@@ -179,7 +179,7 @@ void check_session_character_set_results(MYSQL* proxysql_mysql) {
 		return;
 	}
 
-	query_res = mysql_query(proxysql_mysql, "SELECT @@character_set_results");
+	query_res = mysql_query(proxysql_mysql, "SELECT /* ;hostgroup=1300 */ @@character_set_results");
 	if (query_res) {
 		diag("Query failed with error: %s", mysql_error(proxysql_mysql));
 		return;