Minor, move tests about Java field and Kotlin property

Because the `fieldRename` directory was originally about cases when
private fields are renamed because of clashes.

compiler/testData/codegen/box/javaFieldAndKotlinProperty/javaFieldAndKotlinLateinitProperty.kt

@@ -0,0 +1,24 @@
+// TARGET_BACKEND: JVM_IR
+// Field VS property: case "lateinit"
+
+// FILE: BaseJava.java
+public class BaseJava {
+    public String a = "FAIL";
+
+    public String fieldValue() {
+        return a;
+    }
+}
+
+// FILE: Derived.kt
+class Derived : BaseJava() {
+    lateinit var a: String
+}
+
+fun box(): String {
+    val d = Derived()
+    d.a = "OK"
+    if ((d as BaseJava).a == "OK") return "FAIL (accidental shadowed field access #1)"
+    if (d.fieldValue() == "OK") return "FAIL (accidental shadowed field access #2)"
+    return d.a
+}