Adds optional way to set damage randomness on or off on individual integration tests.

PkmnLib.Tests/Integration/Models/IntegrationTestModel.cs

@@ -18,6 +18,7 @@ public class IntegrationTestBattleSetup
     public bool CanFlee { get; set; }
     public byte NumberOfSides { get; set; }
     public byte PositionsPerSide { get; set; }
+    public bool HasDamageRandomness { get; set; }
     public IntegrationTestParty[] Parties { get; set; } = null!;
 }