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/javaFieldAndCompanionProperty.kt

@@ -0,0 +1,37 @@
+// TARGET_BACKEND: JVM_IR
+// IGNORE_BACKEND: JVM_IR
+// IGNORE_BACKEND_FIR: JVM_IR
+// FIR_STATUS: accesses companion property backing field statically and fails (does not work in K1/JVM too)
+
+// FILE: Base.java
+public class Base {
+    protected String TAG = "OK";
+
+    public String foo() {
+        return TAG;
+    }
+}
+
+// FILE: Sub.kt
+
+class Sub : Base() {
+    companion object {
+        val TAG = "FAIL"
+    }
+
+    fun log() = TAG
+
+    fun logReference() = this::TAG.get()
+
+    fun logAssignment(): String {
+        TAG = "12"
+        if (foo() != "12") return "Error writing: ${foo()}"
+        return "OK"
+    }
+}
+
+fun box(): String {
+    if (Sub().log() != "OK") return Sub().log()
+    if (Sub().logReference() != "OK") return Sub().logReference()
+    return Sub().logAssignment()
+}