pull up: don't prepare for interface if pull up to class (IDEA-144043)

java/java-tests/testData/refactoring/pullUp/PullUpAsAbstractInClass_after.java

@@ -0,0 +1,7 @@
+abstract class A {
+    public abstract void test();
+}
+class B extends A {
+  @Override
+  public void test(){}
+}