Refactor stack handling to always use TracingContext to populate real stack on exception (#106277)
The basic gist of the PR is simple, but it's accompanied with some careful modifications and unit tests to make sure I got it right. Check inline comments for more details.
Signed-off-by: Edward Z. Yang <ezyang@meta.com>
Pull Request resolved: https://github.com/pytorch/pytorch/pull/106277
Approved by: https://github.com/albanD, https://github.com/voznesenskym
