mm/debug_vm_pgtable: add [pte|pmd]_mkwrite_novma() tests

mm/debug_vm_pgtable: add [pte|pmd]_mkwrite_novma() tests

Add some [pte|pmd]_mkwrite_novma() relevant tests.

[anshuman.khandual@arm.com: add a new test combination per Huang Ying]
Link: https://lkml.kernel.org/r/20251024013137.136926-1-anshuman.khandual@arm.com
Link: https://lkml.kernel.org/r/20251022032951.3498553-1-anshuman.khandual@arm.com
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Suggested-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Huang Ying <ying.huang@linux.alibaba.com>
Acked-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>