CVE-2020-25722 selftest: Use self.assertRaisesLdbError() in user_account_control...

CVE-2020-25722 selftest: Use self.assertRaisesLdbError() in user_account_control.py test

This changes most of the simple pattern with self.samdb.modify()
to use the wrapper.  Some other calls still need to be converted, while
the complex decision tree tests should remain as-is for now.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=14753

Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Mon Oct  4 21:55:43 UTC 2021 on sn-devel-184

(cherry picked from commit b45190bdac7bd9dcefd5ed88be4bd9a97a712664)