Redundant override inspection: don't report for ambiguous derivation

#KT-24405 Fixed
#KT-25883 Fixed

idea/testData/inspectionsLocal/redundantOverride/twoInterfaces.kt

@@ -0,0 +1,13 @@
+// PROBLEM: none
+
+interface Foo {
+    fun test()
+}
+
+interface Gav {
+    fun test() {}
+}
+
+class TwoInterfaces : Foo, Gav {
+    override <caret>fun test() = super.test()
+}