Hide cascade messages in collate tests

These are not relevant to the tests and would just uselessly bloat
patches.

src/test/regress/expected/collate.icu.utf8.out

@@ -1101,26 +1101,8 @@ select textrange_en_us('A','Z') @> 'b'::text;
 drop type textrange_c;
 drop type textrange_en_us;
 -- cleanup
+SET client_min_messages TO warning;
 DROP SCHEMA collate_tests CASCADE;
-NOTICE:  drop cascades to 18 other objects
-DETAIL:  drop cascades to table collate_test1
-drop cascades to table collate_test_like
-drop cascades to table collate_test2
-drop cascades to table collate_test3
-drop cascades to type testdomain_sv
-drop cascades to table collate_test4
-drop cascades to table collate_test5
-drop cascades to table collate_test10
-drop cascades to table collate_test6
-drop cascades to view collview1
-drop cascades to view collview2
-drop cascades to view collview3
-drop cascades to type testdomain
-drop cascades to function mylt(text,text)
-drop cascades to function mylt_noninline(text,text)
-drop cascades to function mylt_plpgsql(text,text)
-drop cascades to function mylt2(text,text)
-drop cascades to function dup(anyelement)
 RESET search_path;
 -- leave a collation for pg_upgrade test
 CREATE COLLATION coll_icu_upgrade FROM "und-x-icu";

src/test/regress/expected/collate.linux.utf8.out

@@ -1118,23 +1118,5 @@ select textrange_en_us('A','Z') @> 'b'::text;
 drop type textrange_c;
 drop type textrange_en_us;
 -- cleanup
+SET client_min_messages TO warning;
 DROP SCHEMA collate_tests CASCADE;
-NOTICE:  drop cascades to 18 other objects
-DETAIL:  drop cascades to table collate_test1
-drop cascades to table collate_test_like
-drop cascades to table collate_test2
-drop cascades to table collate_test3
-drop cascades to type testdomain_sv
-drop cascades to table collate_test4
-drop cascades to table collate_test5
-drop cascades to table collate_test10
-drop cascades to table collate_test6
-drop cascades to view collview1
-drop cascades to view collview2
-drop cascades to view collview3
-drop cascades to type testdomain
-drop cascades to function mylt(text,text)
-drop cascades to function mylt_noninline(text,text)
-drop cascades to function mylt_plpgsql(text,text)
-drop cascades to function mylt2(text,text)
-drop cascades to function dup(anyelement)

src/test/regress/sql/collate.icu.utf8.sql

@@ -426,6 +426,7 @@ drop type textrange_en_us;
 
 
 -- cleanup
+SET client_min_messages TO warning;
 DROP SCHEMA collate_tests CASCADE;
 RESET search_path;
 

src/test/regress/sql/collate.linux.utf8.sql

@@ -429,4 +429,5 @@ drop type textrange_en_us;
 
 
 -- cleanup
+SET client_min_messages TO warning;
 DROP SCHEMA collate_tests CASCADE;