[FEAT MERGE] Implement tenant cloning mechanism

Co-authored-by: wanyue-wy <345657357@qq.com>

src/sql/parser/non_reserved_keywords_mysql_mode.c

@@ -1002,6 +1002,8 @@ static const NonReservedKeyword Mysql_none_reserved_keywords[] =
   {"statement_id", STATEMENT_ID},
   {"TTL", TTL},
   {"kv_attributes", KV_ATTRIBUTES},
+  {"RESOURCE_POOL", RESOURCE_POOL},
+  {"clone", CLONE},
 };
 
 /** https://dev.mysql.com/doc/refman/5.7/en/sql-syntax-prepared-statements.html