Increase the patch approval test timeout (#34438)

## Why

Patch approval events can take longer than the default test event timeout.

## What changed

Wait up to 15 seconds for a patch approval request or turn completion in the
approval test helper, while preserving the existing event checks and assertions.

GitOrigin-RevId: 73a50538482b5a88ccf0be07f8fad21000e54699

codex-rs/core/tests/suite/approvals.rs

@@ -803,12 +803,16 @@ async fn expect_patch_approval(
     test: &TestCodex,
     expected_call_id: &str,
 ) -> ApplyPatchApprovalRequestEvent {
-    let event = wait_for_event(&test.codex, |event| {
-        matches!(
-            event,
-            EventMsg::ApplyPatchApprovalRequest(_) | EventMsg::TurnComplete(_)
-        )
-    })
+    let event = wait_for_event_with_timeout(
+        &test.codex,
+        |event| {
+            matches!(
+                event,
+                EventMsg::ApplyPatchApprovalRequest(_) | EventMsg::TurnComplete(_)
+            )
+        },
+        Duration::from_secs(15),
+    )
     .await;
 
     match event {