Those are no longer needed. The system mesa contains fully functioning
asahi OpenGL/Vulkan drivers so there is no need to provide older
llvm-libs and clang-libs for mesa overlays.
This became necessary with 10.0.13 / after merging
https://github.com/OSInside/kiwi/pull/2535 but doesn't seem to
noticeable effects besides miisin "GRUB_ENABLE_BLSCFG=true" in
/etc/default/grub.
menu_auto_hide=1 is required for the boot_success provided by Fedora's
grub2 package. This will fall back to the previous kernel and show the
usually hidden grub menu when booting fails.
This makes it unnecessary to override the timeout_style and using a
reduced timeout of 1 second for disk images.
Janne Grunau