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/javaFieldKotlinPropertyJavaField.kt

@@ -0,0 +1,26 @@
+// TARGET_BACKEND: JVM_IR
+// IGNORE_BACKEND_K1: JVM_IR
+// IGNORE_BACKEND_K2: JVM_IR
+// tried to access field B.f from class TestKt
+
+// FILE: A.java
+
+public class A {
+    String f = "OK";
+}
+
+// FILE: B.kt
+
+open class B : A() {
+    private val f = "FAIL"
+}
+
+// FILE: C.java
+
+public class C extends B {}
+
+// FILE: test.kt
+
+fun box(): String {
+    return C().f
+}