d3d12: Use buffer pipe usage to inform allocation

d3d12: Use buffer pipe usage to inform allocation

For non-CPU-accessible pipe resource types (DEFAULT/IMMUTABLE),
allocate non-CPU-accessible buffers directly from the cache_bufmgr.
Update the d3d12_bo creation to handle nonmappable buffers.

For CPU-write-only (DYNAMIC/STREAM), use the upload slab_bufmgr.
Update this slab manager to use CPU_WRITE | GPU_READ PB usage.

For CPU-read-write (STAGING), use the readback_slab_bufmgr.

Reviewed-by: Louis-Francis Ratté-Boulianne <lfrb@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8095>