Bug #28258992  FUNCTION CALL NOT WRITTEN TO BINLOG IF IT CONTAIN DML ALONG WITH DROP TEMP TABLE - post fix

Problem 1
=========
Calling a function updating temporary table is not compatible with
FLUSH TABLES WITH READ LOCK in mixed mode, because we set binlog
format to statement for writing a 'function call' top statement
into binary log if the function contains DML statement(s) on
temporary table in mixed mode after fixing Bug#28258992. Which
causes an known timeout issue in statement binlog format.

Fix 1
=====
To fix the problem, split the case from original script and
only run the case in row binlog format.

Problem 2
=========
There is an assertion `thd->binlog_evt_union.do_union' failure in
MYSQL_BIN_LOG::stop_union_events(...) when restoring sub statement
state. The root cause is that we change the binlog format after
resetting sub statement state when executing a function which
contains DML statement(s) on temporary table.

Fix 2
=====
To fix the problem, we change the binlog format before resetting
sub statement state when executing a function which contains DML
statement(s) on temporary table.