Fix MTR test galera.galera_trigger

Changed the test so that it does not rely on specific auto increment
ids. With Galera's default wsrep_auto_increment_control setting it is
not guaranteed that auto increments always start from 1. The test was
occasionally failing due to result content mismatch.
Reviewed-by: Jan Lindström <jan.lindstrom@mariadb.com>

mysql-test/suite/galera/r/galera_trigger.result

@@ -30,3 +30,47 @@ id
 200
 DROP TRIGGER tr1;
 DROP TABLE t1;
+connection node_1;
+CREATE TABLE t1(id int not null auto_increment, value int not null, primary key (id)) engine=innodb;
+CREATE TABLE t2(id int not null auto_increment, tbl varchar(64) not null, action varchar(64) not null, primary key (id));
+create trigger log_insert after insert on t1
+for each row begin
+insert into t2(tbl, action) values ('t1', 'INSERT');
+end|
+insert into t1(value) values (1);
+insert into t1(value) values (2);
+connection node_2;
+set session wsrep_sync_wait=15;
+insert into t1(value) values (3);
+insert into t1(value) values (4);
+select tbl, action from t2;
+tbl	action
+t1	INSERT
+t1	INSERT
+t1	INSERT
+t1	INSERT
+connection node_1;
+drop trigger if exists log_insert;
+insert into t1(value) values (5);
+select tbl, action from t2;
+tbl	action
+t1	INSERT
+t1	INSERT
+t1	INSERT
+t1	INSERT
+connection node_2;
+insert into t1(value) values (6);
+select tbl, action from t2;
+tbl	action
+t1	INSERT
+t1	INSERT
+t1	INSERT
+t1	INSERT
+connection node_1;
+select tbl, action from t2;
+tbl	action
+t1	INSERT
+t1	INSERT
+t1	INSERT
+t1	INSERT
+drop table t1, t2;

mysql-test/suite/galera/t/galera_trigger.test

@@ -33,4 +33,40 @@ SELECT * FROM t1;
 
 DROP TRIGGER tr1;
 DROP TABLE t1;
+#
+# MDEV-23638 : DROP TRIGGER in Galera Cluster not replicating
+#
+--connection node_1
+CREATE TABLE t1(id int not null auto_increment, value int not null, primary key (id)) engine=innodb;
+
+CREATE TABLE t2(id int not null auto_increment, tbl varchar(64) not null, action varchar(64) not null, primary key (id));
+
+--delimiter |
+create trigger log_insert after insert on t1
+for each row begin
+    insert into t2(tbl, action) values ('t1', 'INSERT');
+end|
+--delimiter ;
+
+insert into t1(value) values (1);
+insert into t1(value) values (2);
+
+--connection node_2
+set session wsrep_sync_wait=15;
+insert into t1(value) values (3);
+insert into t1(value) values (4);
+select tbl, action from t2;
+
+--connection node_1
+drop trigger if exists log_insert;
+insert into t1(value) values (5);
+select tbl, action from t2;
+
+--connection node_2
+insert into t1(value) values (6);
+select tbl, action from t2;
+
+--connection node_1
+select tbl, action from t2;
 
+drop table t1, t2;