Use symbolic tracing_mode for aot repro with dynamic_shapes (#93393)
This is by no means a complete fix for broken aot symbolic
tracing, but it is definitely better what we have right now.
More context: https://github.com/pytorch/pytorch/issues/93367
Signed-off-by: Edward Z. Yang <ezyang@meta.com>
Pull Request resolved: https://github.com/pytorch/pytorch/pull/93393
Approved by: https://github.com/SherlockNoMad, https://github.com/bdhirsh
