MDEV-7850: Extend GTID Binlog Events with Thread Id
This patch augments Gtid_log_event with the user thread-id. In particular that compensates for the loss of this info in Rows_log_events. Gtid_log_event::thread_id gets visible in mysqlbinlog output like #231025 16:21:45 server id 1 end_log_pos 537 CRC32 0x1cf1d963 GTID 0-1-2 ddl thread_id=10 as 64 bit unsigned integer. While the size of Gtid event has grown by 8-9 bytes replication from OLD <-> NEW is not affected by it. This work was started by the late Sujatha Sivakumar. Brandon Nesterenko took it over, reviewed initial patches and extended the work. Reviewed-by: <andrei.elkin@mariadb.com>
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