tests: Move keys into ./tests/keys/ and add a third
ed25519 key.
The third key will be used in an upcoming commit.
Rename public keys to .pub.
* guix/tests/gnupg.scm (%
ed25519-3-public-key-file): New variable.
(%
ed25519-3-secret-key-file): New variable.
(%
ed25519-2-public-key-file): Renamed from %ed25519bis-public-key-file.
(%
ed25519-2-secret-key-file): Renamed from %ed25519bis-secret-key-file.
* tests/keys/
ed25519-3.key: New file.
* tests/keys/
ed25519-3.sec: New file.
Signed-off-by: Mathieu Othacehe <othacehe@gnu.org>