zink: add scaling factor for descriptor set bucket allocations

zink: add scaling factor for descriptor set bucket allocations

now descriptor sets allocate in increasingly large batches based on how many
sets a program has allocated, multiplying by 10 any time the sets hit a power of
10, e.g., if 100 sets are allocated, we now allocate in batches of 100

Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9348>