chore: drop using packages.wolfi.dev
Prefer implicit repositories, or using apk.cgr.dev over explicit packages.wolfi.dev.
Is there any particular reason why we are using those keys (repository, keyring) on these tests/packages anyways? Aren't these set implicitly by our Makefile normally?
the nested apko test case is to build a fresh apko image which is disconnected from the top-level makefile.
the others are redundant, and thus indeed simply removed.
I warn against this until internal issue https://github.com/chainguard-dev/internal-dev/issues/24527 is resolved to ensure these two package repositories are equivalent.
Since the tests passed, this change is unaffected by the above. Note in all of the cases here "any latest will do" and there are no assertions around specific package versions.