testing: Load kdf plugin in all scenarios that require it

Once we use plugin-provided prf+() these won't work otherwise.

testing/tests/ikev2/rw-eap-dynamic/hosts/carol/etc/strongswan.conf

@@ -5,5 +5,5 @@ swanctl {
 }
 
 charon-systemd {
-  load = random nonce aes md5 sha1 sha2 pem pkcs1 curve25519 mgf1 gmp x509 curl revocation hmac gcm vici kernel-netlink socket-default eap-md5 updown
+  load = random nonce aes md5 sha1 sha2 pem pkcs1 curve25519 mgf1 gmp x509 curl revocation hmac kdf gcm vici kernel-netlink socket-default eap-md5 updown
 }

testing/tests/ikev2/rw-eap-dynamic/hosts/dave/etc/strongswan.conf

@@ -5,5 +5,5 @@ swanctl {
 }
 
 charon-systemd {
-  load = random nonce aes md5 sha1 sha2 mgf1 pem pkcs1 curve25519 mgf1 gmp x509 curl revocation hmac gcm vici kernel-netlink socket-default eap-tls updown
+  load = random nonce aes md5 sha1 sha2 mgf1 pem pkcs1 curve25519 mgf1 gmp x509 curl revocation hmac kdf gcm vici kernel-netlink socket-default eap-tls updown
 }

testing/tests/ikev2/rw-eap-dynamic/hosts/moon/etc/strongswan.conf

@@ -5,7 +5,7 @@ swanctl {
 }
 
 charon-systemd {
-  load = random nonce aes sha1 sha2 md5 mgf1 pem pkcs1 curve25519 mfg1 gmp x509 curl revocation hmac vici kernel-netlink socket-default eap-md5 eap-tls eap-dynamic updown
+  load = random nonce aes sha1 sha2 md5 mgf1 pem pkcs1 curve25519 mfg1 gmp x509 curl revocation hmac kdf vici kernel-netlink socket-default eap-md5 eap-tls eap-dynamic updown
 
   plugins {
     eap-dynamic {