[CI]Shard cuda11_1 tests (#53235)
Summary:
As single pytorch_linux_xenial_cuda11_1_cudnn8_py3_gcc7_test hits the timeout
Pull Request resolved: https://github.com/pytorch/pytorch/pull/53235
Reviewed By: glaringlee
Differential Revision: D26802806
Pulled By: malfet
fbshipit-source-id: 8dbd30defa978e806d685b0d851145dc7a9049b4
