We need to freeze binutils at 2.31 (Alpine has 2.32 already), until
issue #295 is resolved. Let's disable the test, so the testsuite passes
again if everything else is good, and we don't start to ignore whether
it fails or not.
Copy all test cases from the pmbootstrap repository, that are actually
testing the aports. They were all adjusted to work nicely in this
repository, together with a brand new set of gitlab-ci configs.
This also includes the changes from this merge request, that had a
better detection of changed packages:
<https://gitlab.com/postmarketOS/pmbootstrap/merge_requests/1621>
