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

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

@@ -0,0 +1,26 @@
+// !CHECK_TYPE
+
+fun foo(x: Number, y: Int) {
+    when (x) {
+        x as Int -> checkSubtype<Int>(x)
+        y -> {}
+        else -> {}
+    }
+    checkSubtype<Int>(x)
+}
+
+fun bar(x: Number) {
+    when (x) {
+        x as Int -> checkSubtype<Int>(x)
+        else -> {}
+    }
+    checkSubtype<Int>(x)
+}
+
+fun whenWithoutSubject(x: Number) {
+    when {
+        (x as Int) == 42 -> checkSubtype<Int>(x)
+        else -> {}
+    }
+    checkSubtype<Int>(x)
+}