cpuset_regression_test in ubuntu_ltp_controllers failed with "TBROK: Both cpuset.cpu_exclusive and cpu_exclusive do not exist" on J/K

Issue found on Jammy 5.15.0-47.51 (only on Jammy, works with older kernels)

With LTP fork updated (bug 1982995) with Luke's fix for cgroups, this test is no longer failing with:

mount: /tmp/ltp-fEJNr5GDB8/LTP_cpuset_regression_test.6l9pALogpn/cpuset_test: cpuset already mounted or mount point busy.
cpuset_regression_test 1 TBROK: mount -t cpuset cpuset cpuset_test failed
umount: cpuset_test: not mounted.

It's now failing with:
INFO: Test start time: Mon Aug 15 17:13:54 UTC 2022
COMMAND: /opt/ltp/bin/ltp-pan -q -e -S -a 738367 -n 738367 -f /tmp/ltp-4IiLM0eywk/alltests -l /dev/null -C /dev/null -T /dev/null
LOG File: /dev/null
FAILED COMMAND File: /dev/null
TCONF COMMAND File: /dev/null
Running tests.......
cpuset_regression_test 1 TINFO: timeout per run is 0h 5m 0s
cpuset_regression_test 1 TINFO: test starts with cgroup version 2
cpuset_regression_test 1 TBROK: Both cpuset.cpu_exclusive and cpu_exclusive do not exist
cpuset_regression_test 1 TINFO: AppArmor enabled, this may affect test results
cpuset_regression_test 1 TINFO: it can be disabled with TST_DISABLE_APPARMOR=1 (requires super/root)
cpuset_regression_test 1 TINFO: loaded AppArmor profiles: none

Summary:
passed 0
failed 0
broken 1
skipped 0
warnings 0
INFO: ltp-pan reported some tests FAIL
LTP Version: 20220527
INFO: Test end time: Mon Aug 15 17:13:54 UTC 2022