devel/rubygem-paperclip-rails50: Deprecate and set expiration date to 2024-04-30

Upstream repo archived Jul 13, 2023 and recommends using Rails' own
ActiveStorage. There's also an active fork located at
https://github.com/kreeti/kt-paperclip

Reference:
https://github.com/thoughtbot/paperclip

Discussed with jrm on IRC