highlighting: don't check static methods for unrelated inheritance (IDEA-178539)

in class case, static methods must have signatures with different erasures, for interfaces, static methods

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/interfaceMethods/InterfaceStaticMethodsWithSameErasure.java

@@ -0,0 +1,15 @@
+import java.util.List;
+
+class InterfaceStaticMethodsWithSameErasure {
+    interface A<I, R> {
+        static <I, R> A<I, R> foo(List<I> a) { return null; }
+    }
+
+    interface B<I, R> extends A<I, R> {
+        static <I, R> B<I, R> foo(List<R> b) { return null; }
+    }
+
+    static abstract class C<I, R> implements B<I, R> { }
+
+    static class D<I, R> extends C<I, R> { }
+}