zink: unbind fb on context destroy

this ensures that batch refs are added for fb surfaces on unbind, which
prevents stale batch tracking from persisting on resources
after the context is destroyed

fixes:
*EGL.functional.render.multi_context*

cc: mesa-stable

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21727>
(cherry picked from commit 62f1a8a3a62efb8370dc51a20244ab23bc60a3b8)
2 files changed