Fixed that log_slow.test works with view_protocol

Part of the test did not work with view_protocol as the query written
to the slow_log table is changed because of view_protocol.

mysql-test/main/log_slow.test

@@ -141,6 +141,7 @@ CREATE TABLE `tab_MDEV_30820` (
 );
 
 --disable_ps2_protocol
+--disable_view_protocol
 
 --delimiter //
 CREATE FUNCTION `get_zero`() RETURNS int(11)
@@ -182,6 +183,7 @@ drop table tab_MDEV_30820, tab2;
 drop function get_zero;
 
 --enable_ps2_protocol
+--enable_view_protocol
 
 --echo #
 --echo # End of 10.4 tests