Don't check class object visibility when it's in qualifier position

(visibility for member is checked anyway).
It might be better to underline invisible qualifier in a chain (class or class object), not the last one (member) - for later improvement.

compiler/testData/diagnostics/tests/classObjects/nestedClassInPrivateClassObject.kt

@@ -10,6 +10,6 @@ class A {
     }
 }
 
-fun f1() = <!INVISIBLE_MEMBER!>A<!>.B.<!INVISIBLE_MEMBER!>C<!>
+fun f1() = A.B.<!INVISIBLE_MEMBER!>C<!>
 
-fun f2() = <!INVISIBLE_MEMBER!>A<!>.B.<!INVISIBLE_MEMBER!>C<!>.<!INVISIBLE_MEMBER!>foo<!>()
+fun f2() = A.B.C.<!INVISIBLE_MEMBER!>foo<!>()