fix(test): import InitializeResult in no-local builds

The reverse cancellation test uses InitializeResult only when the client
feature is enabled without local support. Import it in the matching
configuration so the all-features-except-local CI jobs compile.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: Julien Côté

crates/rmcp/tests/test_cancelled_response.rs

@@ -13,8 +13,8 @@ use rmcp::{
     model::{
         CancelledNotification, CancelledNotificationParam, ClientJsonRpcMessage, ClientRequest,
         ClientResult, ElicitRequest, ElicitRequestParams, ElicitResult, ElicitationAction,
-        ElicitationSchema, PingRequest, RequestId, ServerJsonRpcMessage, ServerNotification,
-        ServerRequest, ServerResult,
+        ElicitationSchema, InitializeResult, PingRequest, RequestId, ServerJsonRpcMessage,
+        ServerNotification, ServerRequest, ServerResult,
     },
     service::{PeerRequestOptions, QuitReason, serve_directly},
     transport::{IntoTransport, Transport},