Infrastructure updates to support Right to Know fix/0.43.2.1

[benrfairless]

Changelog: https://github.com/openaustralia/alaveteli/blob/fix/0.43.2.1/doc/CHANGES.md

Updates Needed:

• This upgrade requires upgrading Ruby from 2.7 to 3.2.9
• Migrating Existing Site Instructions: https://github.com/mysociety/alaveteli/wiki/Migrating-an-existing-Alaveteli-site-from-Ruby-2.7-to-3.x
• Install Redis Server
• Install Sidekiq
• configure Sidekiq to run by creating /etc/systemd/system/sidekiq.service from config/sidekiq.service.example
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