OpInfo for `adaptive_avg_pool2d` (#62704)
Summary:
Please see https://github.com/facebookresearch/functorch/issues/78 and https://github.com/pytorch/pytorch/issues/54261.
Note regarding sample inputs for this function:
* Checks added for all relevant/interesting cases for `output_size`: `(None, None), (None, width), (height, None), (height, width)`.
cc: mruberry zou3519 Chillee
Pull Request resolved: https://github.com/pytorch/pytorch/pull/62704
Reviewed By: H-Huang
Differential Revision: D30138788
Pulled By: zou3519
fbshipit-source-id: 66735ceaa85b9e6050d4ec27749fc3a8108cf557
