misc: Convert UIntUtils.CreateRandom into an extension on Random.

src/Ryujinx.HLE/HOS/Services/Time/Clock/SteadyClockCore.cs

@@ -12,7 +12,7 @@ namespace Ryujinx.HLE.HOS.Services.Time.Clock
 
         public SteadyClockCore()
         {
-            _clockSourceId = UInt128Utils.CreateRandom();
+            _clockSourceId = Random.Shared.NextUInt128();
             _isRtcResetDetected = false;
             _isInitialized = false;
         }

src/Ryujinx.HLE/HOS/Services/Time/Clock/Types/SteadyClockTimePoint.cs

@@ -36,7 +36,7 @@ namespace Ryujinx.HLE.HOS.Services.Time.Clock
             return new SteadyClockTimePoint
             {
                 TimePoint = 0,
-                ClockSourceId = UInt128Utils.CreateRandom(),
+                ClockSourceId = Random.Shared.NextUInt128(),
             };
         }
     }