LV 2.0: update some CLI tests with warnings to use DIVISION_BY_ZERO warning

compiler/testData/cli/jvm/werror.out

@@ -1,14 +1,8 @@
-warning: ATTENTION!
-This build uses unsafe internal compiler arguments:
-
--XXLanguage:+EnableDfaWarningsInK2
-
-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!
-
 error: warnings found and -Werror specified
-compiler/testData/cli/jvm/werror.kt:2:6: warning: unnecessary non-null assertion (!!) on a non-null receiver of type 'kotlin/String'.
-    s!!
-     ^
+compiler/testData/cli/jvm/werror.kt:2:13: warning: division by zero.
+    println(a / 0)
+            ^
+compiler/testData/cli/jvm/werror.kt:3:13: warning: division by zero.
+    println(b / 0)
+            ^
 COMPILATION_ERROR