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

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

@@ -0,0 +1,15 @@
+class WithLateInit {
+    lateinit var x: String
+
+    fun init(xx: String) {
+        x = xx
+    }
+
+    init {
+        // This is obviously a bug,
+        // but with lateinit we explicitly want it to occur in runtime
+        use()
+    }
+
+    fun use() = x
+}