FIR: Implement FE 1.0 semantics for super unqualified calls

See original logic at org.jetbrains.kotlin.types.expressions.unqualifiedSuper.UnqualifiedSuperKt#resolveUnqualifiedSuperFromExpressionContext

^KT-39070 Fixed
^KT-39599 Related

compiler/testData/codegen/box/super/unqualifiedSuperWithMethodsOfAny.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 interface ISomething
 
 open class ClassWithToString {
@@ -23,4 +22,4 @@ fun box(): String {
         C2().toString() != "C" -> "Failed #2"
         else -> "OK"
     }
-}
+}