Replace issue templates with new issue forms - v2 (#69361)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/69361
This PR introduces the new issue forms that replace issue templates.
(This is exactly the same as https://github.com/pytorch/pytorch/pull/65917 which was reverted due to an issue during the import)
This is similar to what was done in torchvision https://github.com/pytorch/vision/pull/4299 and torchaudio, you can see the end result here: https://github.com/pytorch/vision/issues/new/choose (click e.g. on the [bug report](https://github.com/pytorch/vision/issues/new?assignees=&labels=&template=bug-report.yml))
The main new thing is that we can enforce some of the fields to be filled, especially for bug reports. It's also a much cleaner GUI for users IMHO, and we can provide better examples and instructions.
There is still a "blank" template available.
I removed the "Questions" form: we say we close these issues anyway. I replaced it with a direct link to https://discuss.pytorch.org. Since we still have a "blank" template, I think this covers all previous use-cases properly.
Test Plan: Imported from OSS
Reviewed By: albanD, mrshenli
Differential Revision: D32947189
Pulled By: NicolasHug
fbshipit-source-id: f19abe3e7c9c479b0b227969a207916db5bdb6e3
