Add nn.CircularPad{*}d for consistency + fix no_batch_dim support (#106148)
Fixes #105749 https://github.com/pytorch/pytorch/issues/95320
(tldr is that input should always be `[N, C, H, (W, D])` where only H, W and D dimensions get circular padding, so the 2D case where user wants both dimensions to be padded --> they should `.unsqueeze(0)` (as is the case for `Reflection/ReplicationPad`) but we didn't document this for circular padding. [This seems to be the old docstring](https://github.com/pytorch/pytorch/blob/277b05014aced075337d6f84a535bd5150aabebb/torch/nn/functional.py#L4689) that was somehow lost.
Fixes no_batch_dim support https://github.com/pytorch/pytorch/issues/104860
- Adds missing documentation for circular padding
- Adds missing CircularPad modules
- Migrates legacy test_nn tests from circular padding to ModuleInfo
- Adds no_batch_dim support + sample inputs that test this
Pull Request resolved: https://github.com/pytorch/pytorch/pull/106148
Approved by: https://github.com/albanD
ghstack dependencies: #106325, #106147
