Test database is failing on release-12.1 + REL_16_STABLE

[Green-Chan]

0844b396 adds new test database. It fails when running make check-vanilla on release-12.1 with the following diff

@@ -1,14 +1,15 @@
 CREATE DATABASE regression_tbd
        ENCODING utf8 LC_COLLATE "C" LC_CTYPE "C" TEMPLATE template0;
 ALTER DATABASE regression_tbd RENAME TO regression_utf8;
 ALTER DATABASE regression_utf8 SET TABLESPACE regress_tblspace;
+ERROR:  unrecognized ALTER DATABASE option: tablespace
 ALTER DATABASE regression_utf8 RESET TABLESPACE;
 ALTER DATABASE regression_utf8 CONNECTION_LIMIT 123;
 -- Test PgDatabaseToastTable.  Doing this with GRANT would be slow.
 BEGIN;
 UPDATE pg_database
 SET datacl = array_fill(makeaclitem(10, 10, 'USAGE', false), ARRAY[5e5::int])
 WHERE datname = 'regression_utf8';
 -- load catcache entry, if nothing else does
 ALTER DATABASE regression_utf8 RESET TABLESPACE;
 ROLLBACK;

This problem does not occur on main because alter database <database_name> set TABLESPACE <table_space_name> support was added in main by #7253