This are filed as issues so I trust these will not be forgotten:
- MDEV-20372
- MDEV-21965
- MDEV-21968
- MDEV-22119

Having these tests fail the MTR permanently decreases the overall quality
of the software as:
- developers start neglecting the results from CI systems and do not spot
  the new regressions their changes introduce
- reviews take many hours as a diligent reviewer needs to open all build
  logs that are failing, see what is failing, and check if those are new
  failures or not – alternatively reviewers stop looking at CI altogether

It is better to disable these test now and prioritize the MDEVs for the
test failure bugs than keep the MTR red and allow more test failures to
creep in.