MDEV-32050 fixup: Stabilize tests

In any test that uses wait_all_purged.inc, ensure that InnoDB tables
will be created without persistent statistics.

This is a follow-up to commit cd04673a17
after a similar failure was observed in the innodb_zip.blob test.

mysql-test/suite/innodb/t/innodb_stats_persistent.test

@@ -49,7 +49,7 @@ SELECT COUNT(*) FROM t2;
 
 connection con1;
 EXPLAIN SELECT * FROM t2 WHERE val=4;
---source include/wait_all_purged.inc
+SET GLOBAL innodb_max_purge_lag_wait=0;
 --echo # After COMMIT and purge, the DELETE must show up.
 EXPLAIN SELECT * FROM t1 WHERE val=4;