Use autosummary on torch.fft, torch.linalg (#55748)
Summary:
Related to https://github.com/pytorch/pytorch/issues/52256
Use autosummary instead of autofunction to create subpages for `torch.fft` and `torch.linalg` functions.
zou3519
Pull Request resolved: https://github.com/pytorch/pytorch/pull/55748
Reviewed By: jbschlosser
Differential Revision: D27739282
Pulled By: heitorschueroff
fbshipit-source-id: 37aa06cb8959721894ffadc15ae8c3b83481a319
