This reverts commit c37b2087.

In c37b20887, when re-binlogging a GTID event on a replica,
it will overwrite the thread_id from the primary to be the
value of the slave applier (SQL thread or parallel worker).

This should be the value of the original thread_id on the
master connection though, to both help track temporary
tables, and be consistent with Query_log_event.

Reverting the commit to re-target 11.5, so we can re-test
with the corrected thread_id.