[vulkan] TensorConversions remove explicit vulkan ifs (#39019)
Summary:
As a follow up for https://github.com/pytorch/pytorch/pull/36491 and last comments on it.
Vulkan uses Strided Layout (at the moment strides are not supported, but in plan)
empty_strided just forwards to empty_vulkan, ignoring strides params.
Removing explicit ifs in TensorConversions that were added before decision to use Strided layout and have not been cleaned after that :(
Pull Request resolved: https://github.com/pytorch/pytorch/pull/39019
Differential Revision: D21726480
Pulled By: IvanKobzarev
fbshipit-source-id: d465456df248a118bfef441c85280aa0025860cd
