[Test] Support some jvm codegen specific configuration directives

compiler/testData/codegen/box/assert/jvm/interfaceAssertionsEnabled.kt

@@ -1,5 +1,5 @@
 // TARGET_BACKEND: JVM
-// KOTLIN_CONFIGURATION_FLAGS: ASSERTIONS_MODE=jvm
+// ASSERTIONS_MODE: jvm
 // WITH_RUNTIME
 
 package interfaceAssertionsEnabled
@@ -61,4 +61,4 @@ fun box(): String {
     }
 
     return "OK"
-}
+}