check for abstract method implemented optimized: don't go through hierarchy if superClass is not abstract and there is no interfaces, would also fix asm implementations with 'broken' erasures inside

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/advHighlighting6/SkipAbstractMethodsIfTheyMustBeDeclaredInNonAbstractSuperclass.java

@@ -0,0 +1,14 @@
+interface I {
+  void m();
+}
+
+<error descr="Class 'A' must either be declared abstract or implement abstract method 'm()' in 'I'">class A implements I</error> {}
+
+class B extends A {}
+
+class U {
+  {
+    new B() {};
+    B b = new B();
+  }
+}