Apply new symbolic shape strategy to make_fx symbolic mode (#85260)
This results in some test wobbling, which looks legit. I also
added some debug helpers for stuff that I found useful while
working on this.
Signed-off-by: Edward Z. Yang <ezyang@fb.com>
Pull Request resolved: https://github.com/pytorch/pytorch/pull/85260
Approved by: https://github.com/albanD
