Analyze Data Flow: Respect member hierarchies

#KT-11994 In Progress

idea/testData/slicer/outflow/diamondHierarchyMiddleInterfaceFun.kt

@@ -0,0 +1,24 @@
+// FLOW: OUT
+
+interface A {
+    fun foo() = 1
+}
+
+open class B : A {
+    override fun foo() = 2
+}
+
+interface C : A {
+    override fun foo() = <caret>3
+}
+
+class D : B(), C {
+    override fun foo() = 4
+}
+
+fun test(a: A, b: B, c: C, d: D) {
+    val x = a.foo()
+    val y = b.foo()
+    val z = c.foo()
+    val u = d.foo()
+}