feat(connector): integrate netcetera connector with pre authentication flow (#4293)

Co-authored-by: hyperswitch-bot[bot] <148525504+hyperswitch-bot[bot]@users.noreply.github.com>

crates/api_models/src/admin.rs

@@ -505,6 +505,10 @@ pub enum ConnectorAuthType {
     CurrencyAuthKey {
         auth_key_map: HashMap<common_enums::Currency, pii::SecretSerdeValue>,
     },
+    CertificateAuth {
+        certificate: Secret<String>,
+        private_key: Secret<String>,
+    },
     #[default]
     NoKey,
 }