fix: stop using removed worker agent CLI argument (#93)

Signed-off-by: Josh Usiskin <[email protected]>

src/deadline_test_fixtures/deadline/worker.py

@@ -362,7 +362,7 @@ def _start_worker_agent(self) -> None:  # pragma: no cover
         cmd_result = self.send_command(
             " && ".join(
                 [
-                    f"nohup runuser --login {self.configuration.user} -c 'AWS_DEFAULT_REGION={self.configuration.region} deadline-worker-agent --allow-instance-profile >/dev/null 2>&1 &'",
+                    f"nohup runuser --login {self.configuration.user} -c 'AWS_DEFAULT_REGION={self.configuration.region} deadline-worker-agent > /tmp/worker-agent-stdout.txt 2>&1 &'",
                     # Verify Worker is still running
                     "echo Waiting 5s for agent to get started",
                     "sleep 5",