zink: track program usages for each shader

zink: track program usages for each shader

when shaders are created and destroyed in large numbers, the same pointers
get reused for different shaders, which can lead to bad lookups in the
program_cache hash table.

now each shader tracks its program usage to automatically remove itself from
that program in order to avoid hash collisions

fixes mesa/mesa#3053

Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5315>