MDEV-35635: START SLAVE UNTIL allows CHANGE MASTER TO options

Restrict START SLAVE UNTIL to slave options disallowing master options

START SLAVE UNTIL was allowing both slave and master options, which
could cause confusion and misconfigurations. This commit fixes that by
restricting it to these valid slave options:
     - MASTER_LOG_FILE, MASTER_LOG_POS
     - RELAY_LOG_FILE, RELAY_LOG_POS
     - MASTER_GTID_POS

The parser change replaces `master_file_def` with `slave_until_file_def`
in `sql_yacc.yy`, making sure master options like MASTER_USE_GTID and
MASTER_DEMOTE_TO_SLAVE aren’t allowed anymore.

Author: MohanadKh03

mysql-test/main/start_slave_until.test

@@ -10,14 +10,15 @@
 #
 # ==== Method ====
 #
-# 1. Generate binlog events on the master by creating tables and inserting rows.
-# 2. Test various `START SLAVE UNTIL` combinations on the slave:
+# 
+# Test various `START SLAVE UNTIL` combinations on the slave:
 #    a) Invalid parameter mixes (e.g., GTID, LOG_FILE, LOG_POS) to trigger parsing errors.
 #    b) Valid parameter combinations that fail due to incomplete or missing replication setup.
 #
 # ==== Related Bugs ====
 # MDEV-35635 – Issues around parsing and invalid parameter combinations in `START SLAVE UNTIL`.
 
+--source include/not_embedded.inc
 
 #
 # Invalid query options (using slave+master options)