MDEV-22708 Assertion `!mysql_bin_log.is_open() ||...

MDEV-22708 Assertion `!mysql_bin_log.is_open() || thd.is_current_stmt_binlog_format_row()' failed in Delayed_insert::handle_inserts and in Diagnostics_area::set_eof_status

Function `upgrade_lock_type` should check global binlog_format variable
instead of thread one.
Reviewed-by: Jan Lindström <jan.lindstrom@mariadb.com>

sql/sql_insert.cc

@@ -474,7 +474,7 @@ void upgrade_lock_type(THD *thd, thr_lock_type *lock_type,
     }
 
     bool log_on= (thd->variables.option_bits & OPTION_BIN_LOG);
-    if (thd->wsrep_binlog_format() == BINLOG_FORMAT_STMT &&
+    if (WSREP_BINLOG_FORMAT(global_system_variables.binlog_format) == BINLOG_FORMAT_STMT &&
         log_on && mysql_bin_log.is_open())
     {
       /*

sql/wsrep_mysqld.cc

@@ -105,7 +105,7 @@ long wsrep_slave_threads;                       // No. of slave appliers threads
 ulong wsrep_retry_autocommit;                   // Retry aborted autocommit trx
 ulong wsrep_max_ws_size;                        // Max allowed ws (RBR buffer) size
 ulong wsrep_max_ws_rows;                        // Max number of rows in ws
-ulong wsrep_forced_binlog_format;
+ulong wsrep_forced_binlog_format= BINLOG_FORMAT_UNSPEC;
 ulong wsrep_mysql_replication_bundle;
 bool wsrep_gtid_mode;                           // Use wsrep_gtid_domain_id
                                                 // for galera transactions?