iris/bufmgr: Do not use map_gtt or use set/get_tiling on DG1

iris/bufmgr: Do not use map_gtt or use set/get_tiling on DG1

We are starting to see platforms that don't support the get/set tiling
uAPI. (For example, DG1.)

Additionally on DG1 we shouldn't be using the map_gtt anymore.

Let's add some asserts and make sure we don't take those paths
accidentally.

Rework:
 * Jordan: Only apply for DG1, not all gen12
 * Rafael: Use has_tiling_uapi
 * Jordan: Copy has_tiling_uapi from devinfo
 * Jordan: merge in "iris: Rework iris_bo_import_dmabuf() a little."
 * Jordan: Continue to call get/set_tiling on modifier path

Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4956>