Improves fft doc consistency and makes deprecation warnings more prominent (#45409)
Summary:
This PR makes the deprecation warnings for existing fft functions more prominent and makes the torch.stft deprecation warning consistent with our current deprecation planning.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/45409
Reviewed By: ngimel
Differential Revision: D23974975
Pulled By: mruberry
fbshipit-source-id: b90d8276095122ac3542ab625cb49b991379c1f8
