This replaces the old OpenPGPv4 key that is used in the test suite
with a more modern OpenPGPv4 key. The key is the Alice key from
https://datatracker.ietf.org/doc/draft-bre-openpgp-samples/. All
cryptographic artifacts in the test suite are updated accordingly.
Having old cryptographic artifacts in the test suite presents a
problem once the old algorithms are rejected by contemporary
implementations.
* test/lisp/epg-tests.el (ert-x): Require.
(epg-tests-data-directory): Remove variable.
(with-epg-tests): Use ert-resource-file.
* test/lisp/epg-resources/*: Moved from test/data/epg/.