merge `LocalPatchShuffling` into `RandCoarseDropout`

[Nic-Ma]

Is your feature request related to a problem? Please describe.
If comparing to RandCoarseDropout, I think the only difference is that LocalPatchShuffling shuffles the content in a hole instead of filling with random values, so maybe we can refactor RandCoarseDropout to support all cases, or build a base class and subclasses implement different filling method.

[Nic-Ma]

Hi @finalelement ,

Do you have other concerns about this feature request?
If not, I will try to implement it ASAP.

Thanks in advance.

[finalelement]

@Nic-Ma That is a great idea indeed. Do you think, the transform would become too complex though?

[Nic-Ma]

Hi @finalelement ,

Thanks for your support.
I will try to make a base class and several sub-classes for different filling methods.

Thanks.