Don't error if we mark_dynamic without dynamic_shapes on (#98324)
In the terminal state, it won't matter if you have dynamic_shapes
on or not, mark_dynamic will always work.
Today, it's helpful to make this not error so I can easily swap
between static or not and run experiments.
Signed-off-by: Edward Z. Yang <ezyang@meta.com>
Pull Request resolved: https://github.com/pytorch/pytorch/pull/98324
Approved by: https://github.com/voznesenskym
