moreSpecific: check erased signatures when comparing interface methods (IDEA-67519)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/advHighlighting7/ambiguousIDEA67519/pck/AmbiguousMethodCall.java

@@ -0,0 +1,18 @@
+package pck;
+class A<T extends C<String> & D>
+{
+    void bar(T x)
+    {
+        x.foo<error descr="Ambiguous method call: both 'C.foo(String)' and 'D.foo(String)' match">("")</error>;
+    }
+}
+
+interface D
+{
+    abstract void foo(String s);
+}
+
+interface C<T>
+{
+     abstract void foo(T s);
+}