zink: hash in some driver workaround flags to shader cache

these affect shader generation

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30261>

src/gallium/drivers/zink/zink_screen.c

@@ -301,6 +301,9 @@ disk_cache_init(struct zink_screen *screen)
    unsigned shader_debug_flags = zink_debug & ZINK_DEBUG_COMPACT;
    _mesa_sha1_update(&ctx, &shader_debug_flags, sizeof(shader_debug_flags));
 
+   /* add in these shader keys */
+   _mesa_sha1_update(&ctx, &screen->driver_compiler_workarounds, sizeof(screen->driver_compiler_workarounds));
+
    /* Some of the driconf options change shaders.  Let's just hash the whole
     * thing to not forget any (especially as options get added).
     */