Enable AutogradXPU DispatchKey for Intel heterogeneous computation platform. (#61105)
Summary:
Add string wrapper for AutogradXPU to enable this DispatchKey.
We are going to use AutogradXPU as custom autograd backend, which needs this DispatchKey.
This sting wrapper is used to map AutogradXPU to the corresponding DispatchKey.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/61105
Reviewed By: malfet
Differential Revision: D29557697
Pulled By: ezyang
fbshipit-source-id: f0c8155decc8e2fd90741650a05de5a8b5a70121
