Deprecate ignoreDefaultModelOnRedirect property and set to true by default #28324
Description
It's been a long time since this API and available options have been considered, and as per the discussion under #28069, we should review for potential changes towards 6.0.
One option would be to provide a Rendering API that aligns with what is available in WebFlux.
In the very least, we can deprecate the ignoreDefaultModelOnRedirect option on RequestMappingHandlerAdapter and change its default setting.