Fix system tests

[nymous]

The system tests were failing both locally and in CI, with this error (newlines added for readability):

/home/runner/work/lea5/lea5/vendor/bundle/ruby/3.1.0/gems/webdrivers-5.2.0/lib/webdrivers/chromedriver.rb:83:in `rescue in latest_point_release':
Unable to find latest point release version for 125.0.6422. You appear to be using a non-production version of Chrome.
Please set `Webdrivers::Chromedriver.required_version = <desired driver version>` to a known chromedriver version:
https://chromedriver.storage.googleapis.com/index.html (Webdrivers::VersionError)

This was caused by changed in Google hosting and API changes, which were not picked up by the webdrivers gem ¹. This gem's functionality has now been included in selenium-webdriver, so updating it and removing webdrivers fixes this issue.
However we then hit another issue: ArgumentError: wrong number of arguments (given 2, expected 0..1), caused by a change in selenium-webdriver which broke capybara ². It was fixed in 3.39.1.
We had then another error: unknown keyword: :capabilities ³. This was fixed in Rails actionpack 7.0.5.

This PR removes webdrivers from the Gemfile, updates selenium-webdriver and capybara to the latest version, and updates Rails to the latest 7.0.x (staying on the same minor version to have the least amount of changes).
This was done by updating the Gemfile manually, then running bundle update rails selenium-webdrivers capybara.

Finally, the fix on the CI workflow should have been caught in #436 but tests were failing then, so it's fixed here (the codecov action needs an Actions Workflow permission to generate a GitHub OIDC token).

Footnotes

1. https://github.com/titusfortner/webdrivers/issues/247#issuecomment-1641139415 ↩

2. https://github.com/teamcapybara/capybara/issues/2666 ↩

3. https://github.com/rails/rails/releases/tag/v7.0.5 ↩

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (a6aaf04) to head (71f5f55).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master      #439   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           24        24           
  Lines          331       331           
  Branches        33        33           
=========================================
  Hits           331       331           

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[D0gmaDev]

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