Move some tests from boxWithStdlib/ to box/

Move those tests which do not require neither stdlib nor reflect

compiler/testData/codegen/box/regressions/kt5395.kt

@@ -0,0 +1,13 @@
+class D {
+    companion object {
+        protected val F: String = "OK"
+    }
+
+    inner class E {
+        fun foo() = F
+    }
+}
+
+fun box(): String {
+    return D().E().foo()
+}