Support smart cast for nullability in LHS of class literal

#KT-16291 Fixed

js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/JsCodegenBoxTestGenerated.java

@@ -3190,6 +3190,12 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
                 }
                 throw new AssertionError("Looks like this test can be unmuted. Remove IGNORE_BACKEND directive for that.");
             }
+
+            @TestMetadata("smartCast.kt")
+            public void testSmartCast() throws Exception {
+                String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/classLiteral/bound/smartCast.kt");
+                doTest(fileName);
+            }
         }
 
         @TestMetadata("compiler/testData/codegen/box/classLiteral/java")