Quantization docs: rewrite API reference to be more automated (#66201)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/66201
Description:
This PR switches the quantization API reference to use `autosummary`
for each section. We define the sections and manually write a list
of modules/functions/methods to include, and sphinx does the rest.
A result is a single page where we have every quantization function
and module with a quick autogenerated blurb, and user can click
through to each of them for a full documentation page.
This mimics how the `torch.nn` and `torch.nn.functional` doc
pages are set up.
In detail, for each section before this PR:
* creates a new section using `autosummary`
* adds all modules/functions/methods which were previously in the manual section
* adds any additional modules/functions/methods which are public facing but not previously documented
* deletes the old manual summary and all links to it
Test Plan:
```
cd docs
make html
python -m http.server
// renders well, links work
```
Reviewed By: jerryzh168
Differential Revision: D31447615
Pulled By: vkuzo
fbshipit-source-id: 09874ad9629f9c00eeab79c406579c6abd974901
