Provide additional information about missing supertypes

Add -X flag to report extra compiler diagnostics which migth break compatibility.
Use the flag to unconditionally check constructors without fear of
prematurely evaluating lazy supertypes.

KT-19234
KT-42404
KT-44583

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

@@ -168,6 +168,8 @@ enum class LanguageFeature(
     // Looks like we can't enable it until KT-26245 is fixed because otherwise some use cases become broken because of overrides
     ProhibitUsingNullableTypeParameterAgainstNotNullAnnotated(sinceVersion = null, kind = BUG_FIX),
 
+    ExtendedCompilerChecks(sinceVersion = null),
+
     // Experimental features
 
     Coroutines(