Don't set the config_path_pretty variable and pass it through various
functions until it ends up being used in check_option. This was just the
directory name of the kernel config and the kernel config filename (or
in case of pmbootstrap kconfig check --file, just the same as the
config path).
Instead we can just print the filename of the kernel config, for example
"config-postmarketos-qcom-sdm845.aarch64". It is shorter and already
obvious to which package it belongs.
Reviewed-by: Clayton Craft <clayton@craftyguy.net>
Link: https://lists.sr.ht/~postmarketos/pmbootstrap-devel/%3C20230312151325.1968-3-ollieparanoid@postmarketos.org%3E