Update Rails 7 gem and node

[colinbruce]

What

This PR updates the required Rails changes:

• gem and node options to Rails 7.1.1
• removing legacy handler block
• setting load defaults, etc;

as well as:

• A couple of the require blocks seem to no longer autoload from the precise location so these were updated to load explicitly
• Serialize calls now require am explicit coder: type and this has been set to YAML
• The action_dispatch.show_exceptions setting was updated as the original setting made the cucumber tests very noisy
• A change in rails 7.1 now raises errors when any i18n lookup fails. Previously this only failed on views so this adds some error handling in the application code and changes some failing tests, where previously, a deleted key was expected not to be on the page was passing because it didn't find a translation missing error on the view!

Checklist

Before you ask people to review this PR:

• Tests and rubocop should be passing: bundle exec rake
• Github should not be reporting conflicts; you should have recently run git rebase main.
• There should be no unnecessary whitespace changes. These make diffs harder to read and conflicts more likely.
• The PR description should say what you changed and why, with a link to the JIRA story.
• You should have looked at the diff against main and ensured that nothing unexpected is included in your changes.
• You should have checked that the commit messages say why the change was made.

[jsugarman]

👍 Codewise looks fine. much prefer the use of plain text in place of translations in specs.

I imagine some mobbing and/or extensive manual testing would be necessary to feel more confident. On Assure there was an issue with devise that passed all tests but prevented login on staging/production due to AR encryption.

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

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