make modality 'FINAL' for non-class members

not depend on actual modifier since it's not legal there

compiler/testData/diagnostics/tests/declarationChecks/propertyInPackageHasNoInheritVisibility.kt

@@ -0,0 +1,7 @@
+package d
+
+<!ILLEGAL_MODIFIER!>override<!> val f : ()-> Int = { 12 }
+
+fun test() {
+    f()
+}