Add Behaviours support setError() and clearError() for Apwide File Field

As a ScriptRunner user

I want to be able to use Behaviours setError() and clearError() for the Apwide File Field

So that I can mark the field as required and set the field with an error message whenever a condition is met. 

Currently, Behaviours don't consistently work with the Apwide File Field. Behaviours cannot detect the changes on this field, the server-side script isn’t being triggered whenever a change was made.

Example:

If the user sets the Apwide field with setError() API if the field value is null/empty, the error message is still showing and blocking the users from transitioning the issue although the field contains a value.

Hence, it would be great if ScriptRunner Behaviours supports the Apwide File Field.