[Test] Support some jvm codegen specific configuration directives

compiler/testData/codegen/box/assert/alwaysEnable.kt

@@ -3,7 +3,7 @@
 // IGNORE_BACKEND: JS_IR
 // IGNORE_BACKEND: JS_IR_ES6
 // IGNORE_BACKEND: JS
-// KOTLIN_CONFIGURATION_FLAGS: ASSERTIONS_MODE=always-enable
+// ASSERTIONS_MODE: always-enable
 // WITH_RUNTIME
 
 fun checkTrue(): Boolean {
@@ -49,4 +49,4 @@ fun box(): String {
     }
 
     return "OK"
-}
+}