Drop support for `ruby-kafka`

[arielvalentin]

This gem is deprecated and no longer receiving updates

https://github.com/zendesk/ruby-kafka?tab=readme-ov-file#deprecation-notice

0. Release a deprecation notice
1. Remove ruby-kafa from all
2. Remove ruby-kafka from releases
3. Introduce an archive process the keeps the existing source in the repo for reference only

[kaylareopelle]

Some inspiration for component lifecycle processes: https://github.com/open-telemetry/opentelemetry-js-contrib/blob/main/CONTRIBUTING.md#component-lifecycle

[github-actions]

👋 This issue has been marked as stale because it has been open with no activity. You can: comment on the issue or remove the stale label to hold stale off for a while, add the keep label to hold stale off permanently, or do nothing. If you do nothing this issue will be closed eventually by the stale bot.