v3dv: ignore image view aspects for depth/stencil attachments

v3dv: ignore image view aspects for depth/stencil attachments

 From the Vulkan spec:

   "When an image view of a depth/stencil image is used as a
    depth/stencil framebuffer attachment, the aspectMask is ignored
    and both depth and stencil image subresources are used."

So in that scenario, we ignore the aspect mask on the view and go
check the actual format of the underlying image to decide if we
have depth or depth+stencil aspects.

This gets VkRunner's depth-buffer.shader_test to pass.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6766>