tests: fix 02441_alter_delete_and_drop_column flakiness (filter out GET_PART)

Author: azat

tests/queries/0_stateless/02441_alter_delete_and_drop_column.sql

@@ -21,7 +21,7 @@ select sleepEachRow(2) from url('http://localhost:8123/?param_tries={1..10}&quer
     'select * from system.replication_queue where database=''' || currentDatabase() || ''' and table=''mut'' and type=''ALTER_METADATA'''
     ), 'LineAsString', 's String') settings max_threads=1, http_make_head_request=0 format Null;
 
-select type, new_part_name, parts_to_merge from system.replication_queue where database=currentDatabase() and table='mut';
+select type, new_part_name, parts_to_merge from system.replication_queue where database=currentDatabase() and table='mut' and type != 'GET_PART';
 system start merges mut;
 set receive_timeout=30;
 system sync replica mut;