Add pg_dump test for triggers on partitioned tables

This currently works, but add this test to ensure it continues to work.
Lack of this test became evident after a recent bugfix submission that
would have inadvertently broken it, in
https://postgr.es/m/CA+HiwqFM2=i+uHB9o4OkLbE2S3sjPHoVe2wXuAD1GLJ4+Pk9eg@mail.gmail.com

Author: alvherre

src/bin/pg_dump/t/002_pg_dump.pl

@@ -2377,6 +2377,32 @@
 		},
 	},
 
+	'Creation of row-level trigger in partitioned table' => {
+		create_order => 92,
+		create_sql   => 'CREATE TRIGGER test_trigger
+		   AFTER INSERT ON dump_test.measurement
+		   FOR EACH ROW EXECUTE PROCEDURE dump_test.trigger_func()',
+		regexp => qr/^
+			\QCREATE TRIGGER test_trigger AFTER INSERT ON dump_test.measurement \E
+			\QFOR EACH ROW \E
+			\QEXECUTE FUNCTION dump_test.trigger_func();\E
+			/xm,
+		like => {
+			%full_runs, %dump_test_schema_runs, section_post_data => 1,
+		},
+		unlike => {
+			exclude_dump_test_schema => 1,
+		},
+	},
+
+	# this shouldn't ever get emitted
+	'Creation of row-level trigger in partition' => {
+		regexp => qr/^
+			\QCREATE TRIGGER test_trigger AFTER INSERT ON dump_test_second_schema.measurement\E
+			/xm,
+		like => {},
+	},
+
 	'CREATE TABLE test_fourth_table_zero_col' => {
 		create_order => 6,
 		create_sql   => 'CREATE TABLE dump_test.test_fourth_table (