test(aot): add trait private property write inherited test case

- Create new test file for trait method writing injected private property on child object
- Add trait PrivatePropertyWriter with private array property and items method
- Implement PropertyOwner class using the trait
- Create ChildPropertyOwner class extending PropertyOwner
- Add main function to test the inherited private property access
- Define expected output for the array dump result

tests/aot/basic/trait-private-property-write-inherited.phpt

@@ -0,0 +1,44 @@
+--TEST--
+trait method writes injected private property on child object
+--SKIPIF--
+--FILE--
+<?php
+
+trait PrivatePropertyWriter
+{
+    private ?array $items = null;
+
+    public function items(): array
+    {
+        if ($this->items !== null) {
+            return $this->items;
+        }
+        return $this->items = [1, 3, 4];
+    }
+}
+
+class PropertyOwner
+{
+    use PrivatePropertyWriter;
+}
+
+class ChildPropertyOwner extends PropertyOwner
+{
+}
+
+function main(): void
+{
+    $object = new ChildPropertyOwner();
+    var_dump($object->items());
+}
+
+?>
+--EXPECT--
+array(3) {
+  [0]=>
+  int(1)
+  [1]=>
+  int(3)
+  [2]=>
+  int(4)
+}