Indicator on suggested actions (card action) for hero card to show that the action will open a URL

My original request posted on the webchat repo, however I was direct here as I am using an adaptive card in my example:

https://github.com/microsoft/BotFramework-WebChat/issues/3833

For the suggested actions for adaptive cards, I would like to indicate what type of action would be taken by clicking the button. For example for "Action.OpenUrl", I would like to indicate on the button that this will take you to an external URL:

At the moment this is no possible as every button is rendered with the same CSS so there is no way to differentiate which type of button has been rendered.

Is it possible to include the action type as part of the CSS on the rendered button as shown below?

@corinagum from the webchat repo suggested adding role=link for buttons that use the "openurl" action type

Start by tracing the adaptive-card suggested-action renderer and the shared CSS for rendered buttons, then compare Action.OpenUrl with the other action types. Done means URL-opening actions have a distinguishable link indication while other actions retain their existing behavior.