freedreno/a6xx: Add bindless state

freedreno/a6xx: Add bindless state

This will be used when we switch over to lowering image/SSBO to
bindless.

Note that it also starts using CP_SET_DRAW_STATE in the compute path.
Subsequent cleanup will switch texture and eventually other state over
as well (which will make more sense when we get more clever than
emitting all state for every compute grid, but for now simplifies
re-using the same code between 3d and compute).

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20687>