[IR] dumpKotlinLike: add testdata for FIR tests

compiler/testData/ir/irText/classes/innerClassWithDelegatingConstructor.fir.kt.txt

@@ -0,0 +1,25 @@
+class Outer {
+  constructor() /* primary */ {
+    super/*Any*/()
+    /* <init>() */
+
+  }
+
+  inner class Inner {
+    constructor(x: Int) /* primary */ {
+      super/*Any*/()
+      /* <init>() */
+
+    }
+
+    val x: Int
+      field = x
+      get
+
+    constructor() {
+      <this>.this/*Inner*/(x = 0)
+    }
+
+  }
+
+}