chore: deprecate scala.annotation.elidable

[hamzaremmal]

Closes #22754

[tgodzik]

@hamzaremmal hamzaremmal requested a review from code owner

Did you request a review from yourself? :D There is no one else in that group

[tgodzik]

Och, I guess that is automatic 👍

[hamzaremmal]

@hamzaremmal hamzaremmal requested a review from code owner

Did you request a review from yourself? :D There is no one else in that group

GitHub does it automatically for any changes in the stdlib files :).
We still need to decide who else should have a say on the stdlib (aka be in that team) and we will have it as a topic for one of the upcoming core meetings. For now, I'm the stdlib master 😂 .