test: add more tests for Sipi responses (NO-TICKET)

[seakayone]

Pull Request Checklist

Task Description/Number

• Add more tests for iiif endpoint
• Refactor SipiIT to split suites by endpoints

Issue Number: NO-TICKET

Basic Requirements

Please check if your PR fulfills the following requirements:

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• fix: represents bug fixes
• refactor: represents production code refactoring
• feat: represents a new feature
• docs: documentation changes (no production code change)
• chore: maintenance tasks (no production code change)
• test: all about tests: adding, refactoring tests (no production code change)
• other... Please describe:

Does this PR introduce a breaking change?

• Yes
• No
• Maybe (not 100% sure => check with FE)

Does this PR change client-test-data?

• Yes (don't forget to update the JS-LIB team about the change)
• No

[codecov]

Codecov Report

Patch coverage: 96.08% and project coverage change: +2.17 🎉

Comparison is base (7af1c27) 85.13% compared to head (cd160cf) 87.31%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2679      +/-   ##
==========================================
+ Coverage   85.13%   87.31%   +2.17%     
==========================================
  Files         277      277              
  Lines       28958    28795     -163     
==========================================
+ Hits        24654    25141     +487     
+ Misses       4304     3654     -650     

Impacted Files	Coverage Δ
...a/webapi/messages/util/search/QueryTraverser.scala	92.20% <ø> (-0.10%)	⬇️
...nora/webapi/messages/util/search/SparqlQuery.scala	83.01% <ø> (+0.77%)	⬆️
...h/gravsearch/transformers/OntologyInferencer.scala	92.50% <ø> (-1.25%)	⬇️
...ch/gravsearch/transformers/SelectTransformer.scala	83.33% <ø> (-2.39%)	⬇️
...rch/gravsearch/transformers/WhereTransformer.scala	100.00% <ø> (ø)
...api/messages/util/standoff/StandoffTagUtilV2.scala	85.78% <ø> (ø)
...ra/webapi/responders/admin/ListsResponderADM.scala	86.94% <0.00%> (ø)
...knora/webapi/responders/v1/SearchResponderV1.scala	90.85% <ø> (ø)
...ora/webapi/responders/v2/StandoffResponderV2.scala	88.64% <ø> (ø)
...api/routing/admin/lists/GetListItemsRouteADM.scala	100.00% <ø> (ø)
... and 44 more

... and 32 files with indirect coverage changes

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.

[mpro7]

Shouldn't it be logged instead of printed or is this println something you forgot to remove?