testing: Add ikev2/rw-cert-multi-ke scenario

testing/tests/ikev2/rw-cert-multi-ke/hosts/moon/etc/strongswan.conf

@@ -0,0 +1,9 @@
+# /etc/strongswan.conf - strongSwan configuration file
+
+swanctl {
+  load = pem pkcs1 x509 revocation constraints pubkey openssl random
+}
+
+charon-systemd {
+  load = random nonce openssl pem pkcs1 x509 revocation constraints curl kernel-netlink socket-default updown vici
+}