Add support for dynamic kwarg to torch._dynamo.optimize (#89290)
This is an easier way to enable dynamic shapes for a region.
Signed-off-by: Edward Z. Yang <ezyang@fb.com>
Pull Request resolved: https://github.com/pytorch/pytorch/pull/89290
Approved by: https://github.com/soumith, https://github.com/jansel, https://github.com/voznesenskym
