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

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

@@ -0,0 +1,11 @@
+interface Base {
+    val x: Int
+}
+
+open class Impl(override val x: Int) : Base {
+    init {
+        if (this.x != 0) foo()
+    }
+}
+
+fun foo() {}