Add comptime.breakpoint (#102758)
This sets a pdb breakpoint to fire whenever we *compile* this
Python code in Dynamo.
Signed-off-by: Edward Z. Yang <ezyang@meta.com>
Pull Request resolved: https://github.com/pytorch/pytorch/pull/102758
Approved by: https://github.com/zou3519, https://github.com/voznesenskym
