Use std::chrono::microseconds explicitly for Duration. Fix compiler warning related to timeouts

src/io/simulator/simulator_handle.hpp

@@ -89,12 +89,10 @@ class SimulatorHandle {
       if (dop.deadline < now) {
         spdlog::debug("timing out request from requester {} to replier {}.", promise_key.requester_address.ToString(),
                       promise_key.replier_address.ToString());
-        DeadlineAndOpaquePromise dop = std::move(dop);
+        std::move(dop).promise.TimeOut();
         promises_.erase(promise_key);
 
         stats_.timed_out_requests++;
-
-        dop.promise.TimeOut();
       }
     }
   }

src/io/time.hpp

@@ -15,7 +15,7 @@
 
 namespace memgraph::io {
 
-using Duration = std::chrono::duration<int64_t, std::ratio<1, 1000000>>;
+using Duration = std::chrono::microseconds;
 using Time = std::chrono::time_point<std::chrono::local_t, Duration>;
 
 }  // namespace memgraph::io