Upgrade Ruby from 3.3.10 to 4.0.2

[yagosansz]

What github issue is this PR for, if any?

Resolves #6750

What changed, and why?

We're upgrading Ruby from 3.3.10 to 4.0.2.

How is this tested? (please write rspec and jest tests!) 💖💪

Note: if you see a flake in your test build in github actions, please post in slack #casa "Flaky test: " :) 💪
Note: We love capybara tests! If you are writing both haml/js and ruby, please try to test your work with tests at every level including system tests like https://github.com/rubyforgood/casa/tree/main/spec/system

I went through the app pages for the users below and did a smoke test through some of the menu options:

• Login as a regular user at http://localhost:3000/users/sign_in.
  • volunteer1@example.com view site as a volunteer
  • supervisor1@example.com view site as a supervisor
  • casa_admin1@example.com view site as an admin
  • casa_admin2-1@example.com view site as admin from a different org
• Login as an all CASA admin at http://localhost:3000/all_casa_admins/sign_in.
  • allcasaadmin@example.com view site as an all CASA admin

Screenshots please :)

Run your local server and take a screenshot of your work! Try to include the URL of the page as well as the contents of the page.

Feelings gif (optional)

What gif best describes your feeling working on this issue? https://giphy.com/

[yagosansz]

Hey folks, this is my first time completing a Ruby upgrade, if there are more things you need me to look at and test please let me know 🙏

I'll do a second pass at this and so more research on things to look out for!