general: Replace high_resolution_clock with steady_clock

On some OSes, high_resolution_clock is an alias to system_clock and is not monotonic in nature. Replace this with steady_clock.

src/video_core/shader_notify.h

@@ -28,6 +28,6 @@ private:
 
     bool completed{};
     int num_when_completed{};
-    std::chrono::high_resolution_clock::time_point complete_time;
+    std::chrono::steady_clock::time_point complete_time;
 };
 } // namespace VideoCore