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

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

@@ -0,0 +1,16 @@
+fun bar(): Boolean { return true }
+
+fun gav(z: String, w: String, arg: Any): String 
+{ return if (arg is String) arg else if (z != "") z else w }
+
+public fun foo(x: String?, z: String?, w: String?): Int {
+    do {
+        gav(z!!, w!!, if (x == null) break else x)
+    } while (bar())
+    // w is not null because of w!!
+    w.length
+    // z is not null because of z!!
+    z.length
+    // x is null because of the break
+    return x.<!INAPPLICABLE_CANDIDATE!>length<!>
+}