zink: never try to oom flush during unsync texture upload

this is very broken

cc: mesa-stable

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33484>

src/gallium/drivers/zink/zink_context.c

@@ -4839,7 +4839,7 @@ zink_copy_image_buffer(struct zink_context *ctx, struct zink_resource *dst, stru
       zink_kopper_present_readback(ctx, img);
    }
 
-   if (ctx->oom_flush && !ctx->in_rp && !ctx->unordered_blitting)
+   if (ctx->oom_flush && !ctx->in_rp && !ctx->unordered_blitting && !unsync)
       flush_batch(ctx, false);
 }