public static WireguardKey generateRandomForTesting() {
        var str = UUID.randomUUID().toString().replace("-", "");
        return new WireguardKey(str + "12345678900=");
    }
Wraps a Wireguard key.
For security reasons, this should only be used for public keys, although private keys use the same format.

@author gjoranv
config-provisioning/src/main/java/com/yahoo/config/provision/WireguardKey.java