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

[graduta]

I have a JIRA ticket

• 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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