[VETS-API] Finish Rails 8 Upgrade

[ryan-mcneil]

Finish Rails 8 (8.0.1 currenlty) upgrade that was started in this ticket.

Blockers

• There's a PR just about ready for activerecord-postgis-adapter to make it compatible with Rails 8
  • Remember to point gemfile back (currently pointed at PR branch to move forward)
• There's an issue with rails_semantic_logger that's breaking a chunk of specs. This issue is comparable, and here's a PR for a potential fix
  • rspec ./modules/my_health/spec/requests/my_health/v1/medical_records/imaging_spec.rb (1 example, though the failure is different in CI vs locally)
  • rspec ./spec/requests/v0/health_records_spec.rb (3 examples)
  • rspec ./spec/requests/swagger_spec.rb (2 examples)

Follow up tickets

• [ ]

Tasks

• Fix remaining broken specs (~20)
• Address any issues with new test configurations
• Address any issues with new development configurations
• Address any issues with new production configurations
• Fix issues associated with new config.autoload_lib default setting
• Create Follow up tickets for any TODOs

Acceptance Criteria

• Rails 8 deployed to Production
• Follow up tickets created