zink: stop leaking inferred resolve surfaces

this is tricky since the ownership model here works the other
way around from normal: the resolve surface's lifetime is
determined by the resource's lifetime, meaning that
the surface should be destroyed by the resource instead
of the resource being destroyed by the surface

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31124>

src/gallium/drivers/zink/zink_context.c

@@ -3880,6 +3880,9 @@ zink_set_framebuffer_state(struct pipe_context *pctx,
          zink_screen_lock_context(screen);
          res->surface = screen->copy_context->base.create_surface(&screen->copy_context->base, &res->base.b, &tmpl);
          zink_screen_unlock_context(screen);
+         /* delete extra ref: the resource controls the surface lifetime, not the other way around */
+         struct pipe_resource *pres = ctx->fb_state.resolve;
+         pipe_resource_reference(&pres, NULL);
       }
    }
    if (depth_bias_scale_factor != ctx->depth_bias_scale_factor &&

src/gallium/drivers/zink/zink_resource.c

@@ -234,6 +234,8 @@ zink_resource_destroy(struct pipe_screen *pscreen,
 {
    struct zink_screen *screen = zink_screen(pscreen);
    struct zink_resource *res = zink_resource(pres);
+   /* prevent double-free when unrefing internal surfaces */
+   res->base.b.reference.count = 999;
    if (pres->target == PIPE_BUFFER) {
       util_range_destroy(&res->valid_buffer_range);
       util_idalloc_mt_free(&screen->buffer_ids, res->base.buffer_id_unique);
@@ -241,10 +243,10 @@ zink_resource_destroy(struct pipe_screen *pscreen,
       simple_mtx_destroy(&res->bufferview_mtx);
       ralloc_free(res->bufferview_cache.table);
    } else {
+      pipe_surface_reference(&res->surface, NULL);
       assert(!_mesa_hash_table_num_entries(&res->surface_cache));
       simple_mtx_destroy(&res->surface_mtx);
       ralloc_free(res->surface_cache.table);
-      pipe_surface_reference(&res->surface, NULL);
    }
    /* no need to do anything for the caches, these objects own the resource lifetimes */