tu: Fix stencil border color with has_z24uint_s8uint

tu: Fix stencil border color with has_z24uint_s8uint

On a650+ we use the new Z24UINT_S8UINT format to sample the stencil
aspect of D24S8, which returns stencil in the second component and also
uses the second integer component for the border color. However Vulkan
mandates that the first component is used for the stencil border color.
There's no workaround we know of, so we have to fall back to the old
behavior where there is a workaround. If we know the format, we can
fixup the border color ourselves though.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17177>