radv: handle sample locations during automatic layout transitions

radv: handle sample locations during automatic layout transitions

From the Vulkan spec 1.1.109:

   "Some implementations may need to evaluate depth image values
    while performing image layout transitions. To accommodate this,
    instances of the VkSampleLocationsInfoEXT structure can be
    specified for each situation where an explicit or automatic
    layout transition has to take place. [...] and
    VkRenderPassSampleLocationsBeginInfoEXT can be chained from
    VkRenderPassBeginInfo to provide sample locations for layout
    transitions performed implicitly by a render pass instance."

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-By: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>