pull up conflicts: forbid to make package local method abstract (IDEA-56130)

java/java-tests/testData/refactoring/extractSuperClass/conflictAbstractPackageLocalMethod/before/a/Test.java

@@ -0,0 +1,5 @@
+package a;
+public class Test {
+    void x() {
+    }
+}

java/java-tests/testData/refactoring/extractSuperClass/conflictAbstractPackageLocalMethod/before/b/E.java

@@ -0,0 +1,2 @@
+package b;
+class E{}