fix: avoid killing stopped ios runner

Author: thymikee

src/platforms/ios/runner-session.ts

@@ -192,7 +192,9 @@ async function stopRunnerSessionInternal(
       new Promise<void>((resolve) => setTimeout(resolve, RUNNER_STOP_WAIT_TIMEOUT_MS)),
     ]);
   } catch {}
-  await killRunnerProcessTree(session.child.pid, 'SIGKILL');
+  if (isRunnerProcessAlive(session.child.pid)) {
+    await killRunnerProcessTree(session.child.pid, 'SIGKILL');
+  }
   cleanupTempFile(session.xctestrunPath);
   cleanupTempFile(session.jsonPath);
   await session.simulatorSetRedirect?.release();