Replace the old kconfig check tests with new ones, that do not rely on:
* any kernel config in pmaports
* the currently required kconfig options set in pmb/config/__init__.py
This will make it much easier to change the required options, and moves
the testsuite a bit more towards making it completely independent from
current pmaports state.
Reviewed-by: Clayton Craft <clayton@craftyguy.net>
Link: https://lists.sr.ht/~postmarketos/pmbootstrap-devel/%3C20230312151325.1968-13-ollieparanoid@postmarketos.org%3E
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