Add missing tests to run_vmtests.sh.  The mm kselftests are run through
run_vmtests.sh.  If a test isn't present in this script, it'll not run
with run_tests or `make -C tools/testing/selftests/mm run_tests`.

[usama.anjum@collabora.com: use correct flag in the code]
  Link: https://lkml.kernel.org/r/20240201130538.1404897-2-usama.anjum@collabora.com
Link: https://lkml.kernel.org/r/20240125154608.720072-6-usama.anjum@collabora.com
Cc: Ryan Roberts <ryan.roberts@arm.com>
Signed-off-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>