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

compiler/testData/diagnostics/tests/smartCasts/varChangedInLocalInitializer.fir.kt

@@ -0,0 +1,10 @@
+fun foo() {
+    class My {
+        val x: Int
+        init {
+            var y: Int?
+            y = 42
+            x = y.hashCode()
+        }
+    }
+}