feat(connector): [Tokenex]Add external vault insert and retrieve flows (#9470)

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

crates/router/tests/connectors/tokenex.rs

@@ -12,8 +12,8 @@ impl utils::Connector for TokenexTest {
     fn get_data(&self) -> api::ConnectorData {
         use router::connector::Tokenex;
         utils::construct_connector_data_old(
-            Box::new(Tokenex::new()),
-            types::Connector::Plaid,
+            Box::new(&Tokenex),
+            types::Connector::Tokenex,
             api::GetToken::Connector,
             None,
         )