Update Compiled Autograd tutorial and pages

[xmfan]

Add Link

https://docs.pytorch.org/tutorials/intermediate/compiled_autograd_tutorial.html

Describe the bug

The tutorial still points to: https://docs.google.com/document/d/11VucFBEewzqgkABIjebZIzMvrXr3BtcY1aGKpX61pJY/edit?tab=t.0#heading=h.nwlpwfw6vxmv, and many of the restrictions have since been lifted.

We can remove that page now. It is also not very indexed and discoverable, so we should track the missing features on either the tutorial page or another page.

Describe your environment

main

[svekars]

Having a page under docs/ for compile_autograd when the API is stable would be good addition.