[O2B-1602] Shared BeamTypesDto should return split input rather than simply validation

[graduta]

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• branch and/or PR name(s) include(s) JIRA ID
• issue has "Fix version" assigned
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Notable changes for users:

• N/A

Notable changes for developers:

• BeamTypesFilterDto will now as per the convention return an array of beam types rather than a string which then every usecase (GetAllLhcFills and GetAllRuns) have to split the input
• tests adapted accordingly

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 46.17%. Comparing base (240113f) to head (37f8eca).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2202      +/-   ##
==========================================
- Coverage   46.20%   46.17%   -0.03%     
==========================================
  Files        1039     1038       -1     
  Lines       17131    17120      -11     
  Branches     3123     3121       -2     
==========================================
- Hits         7915     7905      -10     
+ Misses       9216     9215       -1     

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