test: Simplify OntologyFormatsE2ESpec

[BalduinLandolt]

Pull Request Checklist

Task Description/Number

Issue Number: DEV-

PR Type

• build/chore: maintenance tasks (no production code change)
• docs: documentation changes (no production code change)
• feat: represents new features
• fix: represents bug fixes
• perf: performance improvements
• refactor: represents production code refactoring
• test: adding or refactoring tests (no production code change)

Basic requirements for bug fixes and features

• Tests for the changes have been added
• Docs have been added / updated

Does this PR introduce a breaking change?

• Yes

Does this PR change client-test-data?

• Yes

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.79%. Comparing base (b1d5743) to head (f7a0cc8).
Report is 5 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #3146       +/-   ##
===========================================
+ Coverage   13.18%   88.79%   +75.60%     
===========================================
  Files         266      265        -1     
  Lines       22337    22260       -77     
===========================================
+ Hits         2946    19765    +16819     
+ Misses      19391     2495    -16896     

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