xla

83b5fe8d - update tensor indexing to fail on `non_xla_tensor[xla_tensor]` (#3414)

update tensor indexing to fail on `non_xla_tensor[xla_tensor]` (#3414) * add torch pin * tensor indexing: error when running cpu_tensor[xla_tensor] * lint * lint2 * lint (again) * fix * fix * fix