zink: allocate keys for surface cache to stop using zink_surface::ivci

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/35722>

src/gallium/drivers/zink/zink_resource.c

@@ -213,6 +213,7 @@ zink_destroy_resource_surface_cache(struct zink_screen *screen, struct hash_tabl
       hash_table_foreach_remove(ht, he) {
          struct zink_surface *surf = he->data;
          VKSCR(DestroyImageView)(screen->dev, surf->image_view, NULL);
+         free((void*)he->key);
          FREE(surf);
       }
       ralloc_free(ht->table);

src/gallium/drivers/zink/zink_surface.c

@@ -222,7 +222,7 @@ zink_get_surface(struct zink_context *ctx,
       /* only transient surfaces have nr_samples set */
       surface->base.nr_samples = zink_screen(ctx->base.screen)->info.have_EXT_multisampled_render_to_single_sampled ? templ->nr_samples : 0;
       surface->ivci = *ivci;
-      entry = _mesa_hash_table_insert_pre_hashed(ht, hash, &surface->ivci, surface);
+      entry = _mesa_hash_table_insert_pre_hashed(ht, hash, mem_dup(ivci, sizeof(*ivci)), surface);
       if (!entry) {
          simple_mtx_unlock(&res->obj->surface_mtx);
          return NULL;