Move around some codegen box tests

In tests merged from boxAgainstJava in 29b96aa1, some directories were
named slightly differently compared to box, e.g. "property" vs
"properties", "varargs" vs "vararg". This change renames these, moves
some of the tests to more fitting directories, and also renames
"visibility" to "javaVisibility" because it's about Java visibilities
specifically.

compiler/testData/codegen/box/javaVisibility/protectedAndPackage/protectedStaticClass.kt

@@ -0,0 +1,28 @@
+// TARGET_BACKEND: JVM
+// MODULE: lib
+// FILE: protectedPack/J.java
+
+package protectedPack;
+
+public class J {
+    protected static class Inner {
+        public String foo() {
+            return "OK";
+        }
+    }
+}
+
+// MODULE: main(lib)
+// FILE: 1.kt
+
+package protectedPack
+
+class Derived : J() {
+    fun test(): String {
+        return J.Inner().foo()!!
+    }
+}
+
+fun box(): String {
+    return Derived().test()
+}