zink: add context-based descriptor info tracking infrastructure

this maintains the exact structs needed to update descriptor states

it's incomplete at this moment due to lacking shader image rebinds, but
it's also not yet being used

Reviewed-by: Dave Airlie <airlied@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10699>
2 files changed