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

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

@@ -0,0 +1,13 @@
+fun bar(): Boolean { return true }
+
+fun gav(arg: Any, z: String): String { return if (arg is String) arg else z }
+
+public fun foo(x: String?, z: String?): Int {
+    do {
+        gav(if (x == null) break else x, z!!)
+    } while (bar())
+    // z is nullable despite of z!!
+    z.<!INAPPLICABLE_CANDIDATE!>length<!>
+    // x is null because of the break
+    return x.<!INAPPLICABLE_CANDIDATE!>length<!>
+}