Toggle generation of .ics for Events entries

[koalie]

I'm not entirely certain this is a CMS or Design System issue so I picked the former following my gut.

Describe the issue
In some cases, the Team needs to promote on the public site some events which are managed through the W3C Calendar system (which allows people, based on which groups they belong to, to see more or less information; and to "subscribe" to en event in order to get the joining instructions, etc.)

Both systems generate .ics files with different information.
The W3C Calendar .ics files contains a lot more information, including agenda and joining instructions. Which the Events .ics files would not contain in the cases where we may not expose them publicly.

So in cases described in this issue, it would be ideal if the Event .ics files were not generated / or at least not exposed. This could be achieved through a toggle whose default is "true" but can be set to "false" in the cases we do not want to expose an .ics file.