[Test] Update CLI tests according to new default language version

compiler/testData/cli/jvm/internalArgDisableLanguageFeature.out

@@ -1,13 +1,13 @@
 warning: ATTENTION!
 This build uses unsafe internal compiler arguments:
 
--XXLanguage:-SoundSmartCastsAfterTry
+-XXLanguage:-SealedInterfaces
 
 This mode is not recommended for production use,
 as no stability/compatibility guarantees are given on
 compiler or generated code. Use it at your own risk!
 
-compiler/testData/cli/jvm/legacySmartCastsAfterTry.kt:2:25: warning: variable 'some' initializer is redundant
-    var some: String? = null
-                        ^
-OK
+compiler/testData/cli/jvm/internalArgDisableLanguageFeature.kt:1:1: error: modifier 'sealed' is not applicable to 'interface'
+sealed interface A
+^
+COMPILATION_ERROR