[FIR-TEST] Add new testdata generated after changes in previous commit

compiler/testData/diagnostics/tests/constructorConsistency/openProperty.fir.kt

@@ -0,0 +1,14 @@
+open class Base {
+    open var x: Int
+
+    open var y: Int
+
+    constructor() {
+        x = 42
+        this.y = 24
+        val temp = this.x
+        this.x = y
+        y = temp
+
+    }
+}