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

compiler/testData/diagnostics/tests/regressions/UnavaliableQualifiedThis.fir.kt

@@ -0,0 +1,13 @@
+interface Iterator<out T> {
+ fun next() : T
+ val hasNext : Boolean
+
+ fun <R> map(transform: (element: T) -> R) : Iterator<R> =
+    object : Iterator<R> {
+      override fun next() : R = transform(this@map.<!UNRESOLVED_REFERENCE!>next<!>())
+
+      override val hasNext : Boolean
+        // There's no 'this' associated with the map() function, only this of the Iterator class
+        get() = this@map.<!UNRESOLVED_REFERENCE!>hasNext<!>
+    }
+}