[FIR] Prohibit expect class members with default values actualized

...by fake-override.
It is error without deprecation cycle because `expect` and `actual`
classes are still in Beta and expected impact of change is negligible.

^KT-62036 Fixed

compiler/util/src/org/jetbrains/kotlin/config/LanguageVersionSettings.kt

@@ -306,6 +306,7 @@ enum class LanguageFeature(
     ProhibitMissedMustBeInitializedWhenThereIsNoPrimaryConstructor(KOTLIN_2_0, kind = BUG_FIX), // KT-58472
     MangleCallsToJavaMethodsWithValueClasses(KOTLIN_2_0, kind = OTHER), // KT-55945
     ForbidInferringTypeVariablesIntoEmptyIntersection(KOTLIN_2_0, kind = BUG_FIX), // KT-51221
+    ProhibitDefaultDefaultArgumentsInExpectActualizedByFakeOverride(KOTLIN_2_0, kind = BUG_FIX), // KT-62036
 
     // 2.1