KT-8542 Override dialog: only one class from hierarchy is shown

#KT-8542 Fixed

idea/testData/codeInsight/overrideImplement/ambiguousSuper.kt

@@ -0,0 +1,11 @@
+interface I {
+    open fun foo(){}
+}
+
+open class A {
+    open fun foo(){}
+}
+
+class C : A(), I {
+    <caret>
+}