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/javaFieldAndKotlinInvisibleProperty.kt

@@ -0,0 +1,28 @@
+// TARGET_BACKEND: JVM_IR
+// IGNORE_BACKEND_K1: JVM_IR
+// IGNORE_BACKEND_K2: JVM_IR
+// tried to access field Derived.a from class DerivedKt
+
+// FILE: BaseJava.java
+public class BaseJava {
+    public String a = "OK";
+
+    public String foo() {
+        return a;
+    }
+}
+
+// FILE: Derived.kt
+class Derived : BaseJava() {
+    private val a = "FAIL"
+}
+
+fun box(): String {
+    val first = Derived().a
+    if (first != "OK") return first
+    val d = Derived()
+    if (d::a.get() != "OK") return d::a.get()
+    d.a = "12"
+    if (d.foo() != "12") return "Error writing: ${d.foo()}"
+    return "OK"
+}