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

compiler/testData/diagnostics/tests/dataFlowInfoTraversal/WhileCondition.fir.kt

@@ -0,0 +1,26 @@
+// !CHECK_TYPE
+
+fun simpleWhile(x: Int?, y0: Int) {
+    var y = y0
+    while (x!! == y) {
+        checkSubtype<Int>(x)
+        y++
+    }
+    checkSubtype<Int>(x)
+}
+
+fun whileWithBreak(x: Int?, y0: Int) {
+    var y = y0
+    while (x!! == y) {
+        checkSubtype<Int>(x)
+        break
+    }
+    checkSubtype<Int>(x)
+}
+
+fun whileWithNoCondition(x: Int?) {
+    while (<!SYNTAX!><!>) {
+        x!!
+    }
+    checkSubtype<Int>(x)
+}