Synchronize translations with Lokalise

[osma]

Reasons for creating this PR

We haven't yet started using Lokalise in daily work, so some of the translations in Lokalise didn't match what we have in the Skosmos code base or vice versa. This PR, together with changes done in Lokalise itself, should bring them in sync.

I have also updated the wiki page Translations for Skosmos 3 with more specific instructions about how to use Lokalise to manage translations and how to do push and pull operations in different situations.

Link to relevant issue(s), if any

• part of EPIC: Completing Translation Infrastructure Tasks #1712

Description of the changes in this PR

• remove unnecessary translations for yso-meta classes
• sync fi/sv/se/en translations with the current state in Lokalise
• fix a Cypress test that broke due to a changed translated

Known problems or uncertainties in this PR

There were some translations in our messages.XX.json files for many languages (e.g. de, lv, es, fa) that for some reason didn't exist on the Lokalise side. I tried many times to push these to Lokalise using the translations:push command. The command seemed to work, but the translations didn't actually end up in Lokalise. In the end I uploaded those files in the Lokalise UI. That worked. It was (hopefully) a one off operation that doesn't have to be done again... 🤞

Checklist

• phpUnit tests pass locally with my changes
• I have added tests that show that the new code works, or tests are not relevant for this PR (e.g. only HTML/CSS changes)
• The PR doesn't reduce accessibility of the front-end code (e.g. tab focus, scaling to different resolutions, use of .sr-only class, color contrast)
• The PR doesn't introduce unintended code changes (e.g. empty lines or useless reindentation)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.94%. Comparing base (53aa787) to head (fa7fe98).

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #1760   +/-   ##
=========================================
  Coverage     70.94%   70.94%           
  Complexity     1650     1650           
=========================================
  Files            33       33           
  Lines          4330     4330           
=========================================
  Hits           3072     3072           
  Misses         1258     1258           

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[joelit]

LGTM

Checked out the wiki documentation, Lokalise project on their website, and tested out extracting translations locally from Lokalise. Great success!