Rename little-yso test vocabulary to simply YSO and reconfigure it

[osma]

Reasons for creating this PR

The "Little YSO" test vocabulary was created in #1516 / PR #1531. But the filename little-yso.ttl and especially the vocabulary ID test-with-little-yso are a bit clumsy to work with. In addition, the test configuration for the vocabulary was quite different from what is normally used for YSO.

This PR renames little-yso.ttl to yso.ttl, changes the vocabulary ID to yso and makes the vocabulary configuration better suitable for YSO.

Link to relevant issue(s), if any

• follow-up to PR Added a test vocabulary cut from YSO (Archaeology Group) and its conf… #1531

Description of the changes in this PR

• rename little-yso.ttl to yso.ttl
• rewrite configuration for the small YSO test vocabulary, also changing its vocabulary ID to yso
• modify ModelTest.getLanguages to account for new vocabulary languages (fi, sv, se) introduced by the above configuration change

Known problems or uncertainties in this PR

n/a

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)

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (02a5963) 70.51% compared to head (254ab6a) 70.51%.
Report is 3 commits behind head on skosmos-3.

Additional details and impacted files

@@             Coverage Diff              @@
##             skosmos-3    #1550   +/-   ##
============================================
  Coverage        70.51%   70.51%           
  Complexity        1643     1643           
============================================
  Files               32       32           
  Lines             4314     4314           
============================================
  Hits              3042     3042           
  Misses            1272     1272           

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[miguelvaara]

All looks good! 👍