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

compiler/testData/diagnostics/tests/controlFlowAnalysis/doWhileNotDefined.fir.kt

@@ -0,0 +1,6 @@
+fun test(cond1: Boolean) {
+    do {
+        if (cond1) continue
+        val cond2 = false
+    } while (cond2) // cond2 may be not defined here
+}