Add TORCH_LOGS_FORMAT=short alias (#120757)
Shorthand for `"%(levelname)s:%(name)s:%(message)s"` which is hard to
remember.
I find the default formatter annoying since just the metadata fills up
most of the width of my terminal.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/120757
Approved by: https://github.com/ezyang
