node remote run (docker): for unknown connection type, also keep serialized parameters and save them back

part of fix for WEB-22114 Node.js Remote Interpreter plugin breaks possibility to manage Node versions in Run Configuration
(cherry picked from commit ad6c962)

platform/platform-impl/src/com/intellij/remote/ext/CredentialsManagerImpl.java

@@ -53,6 +53,7 @@ public class CredentialsManagerImpl extends CredentialsManager {
     }
     final UnknownCredentialsHolder credentials = CredentialsType.UNKNOWN.createCredentials();
     credentials.setInterpreterPath(interpreterPath);
+    credentials.load(element);
     data.setCredentials(CredentialsType.UNKNOWN_CREDENTIALS, credentials);
   }
 }