Skip some failing dynamic shape models on periodic (#99895)
After some recent changes, these tests are failing in periodic trunk. So let's move them to unstable while waiting for the team to root cause the issue https://github.com/pytorch/pytorch/issues/99893. Note that a forward fix can use `ciflow/unstable` to run those unstable jobs to confirm that they are fixed.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/99895
Approved by: https://github.com/malfet
