add SparseXPU to dispatch key set autogradother_backends (#70443)
Summary:
According to dispatch table computation logic, if no kernel
register to a certain dispatch key, will use CompositeExplicitAutograd
backend kernel, so we need add sparseXPU key to the alias key pool.
Signed-off-by: Ma, Jing1 <jing1.ma@intel.com>
Pull Request resolved: https://github.com/pytorch/pytorch/pull/70443
Reviewed By: jbschlosser
Differential Revision: D33406004
Pulled By: bdhirsh
fbshipit-source-id: 009037739c818676901b10465632d3fef5ba14f2
