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

compiler/testData/diagnostics/tests/smartCasts/loops/nestedLoopsWithLongBreak.fir.kt

@@ -0,0 +1,20 @@
+fun x(p: String): Boolean { return p == "abc" }
+
+public fun foo(p: String?, r: String?, q: String?): Int {
+    while(true) {
+        q!!.length
+        loop@ do {
+            while(true) {
+                p!!.length
+                if (x(p)) break@loop
+                if (x(q)) break
+            }
+        } while (r == null)
+        if (!x(p)) break
+    }
+    // Long break allows r == null
+    r.<!INAPPLICABLE_CANDIDATE!>length<!>
+    // Smart cast is possible
+    q.length
+    return p.length
+}