feat: Set stripping level to High in CI (#2149)

Author: bitsandfoxes

test/Scripts.Integration.Test/Editor/Builder.cs

@@ -35,10 +35,8 @@ public static void BuildIl2CPPPlayer(BuildTarget target, BuildTargetGroup group,
 #endif
 
         Debug.Log("Builder: Configuring code stripping level");
-#if UNITY_6000_0_OR_NEWER
+#if UNITY_2022_1_OR_NEWER
         PlayerSettings.SetManagedStrippingLevel(NamedBuildTarget.FromBuildTargetGroup(group), ManagedStrippingLevel.High);
-#elif UNITY_2022_1_OR_NEWER
-        PlayerSettings.SetManagedStrippingLevel(NamedBuildTarget.FromBuildTargetGroup(group), ManagedStrippingLevel.Low);
 #elif UNITY_2019_1_OR_NEWER
         PlayerSettings.SetManagedStrippingLevel(group, ManagedStrippingLevel.Low);
 #endif