chore: Simplify layer setup for integration-tests and reduce to two layers

[seakayone]

Pull Request Checklist

Task Description/Number

Reduce the number of integration-test layers to two and extract common layers to a single val.

Issue Number: DEV-628

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?

• Bugfix: represents bug fixes
• Refactor: represents production code refactoring
• Feature: represents a new feature
• Documentation: documentation changes (no production code change)
• Chore: maintenance tasks (no production code change)
• Style: styles updates (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

Does this PR change client-test-data?

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

[codecov]

Codecov Report

Base: 86.68% // Head: 86.48% // Decreases project coverage by -0.19% ⚠️

Coverage data is based on head (21b9044) compared to base (26e9596).
Patch coverage: 8.33% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2339      +/-   ##
==========================================
- Coverage   86.68%   86.48%   -0.20%     
==========================================
  Files         250      257       +7     
  Lines       28252    28315      +63     
==========================================
- Hits        24490    24488       -2     
- Misses       3762     3827      +65     

Impacted Files	Coverage Δ
webapi/src/main/scala/org/knora/webapi/Main.scala	0.00% <0.00%> (ø)
...main/scala/org/knora/webapi/config/AppConfig.scala	81.63% <ø> (ø)
.../main/scala/org/knora/webapi/core/HttpServer.scala	100.00% <ø> (ø)
...main/scala/org/knora/webapi/core/HttpServerZ.scala	0.00% <0.00%> (ø)
.../knora/webapi/core/InstrumentationHttpServer.scala	0.00% <0.00%> (ø)
.../knora/webapi/http/handler/ExceptionHandlerZ.scala	0.00% <0.00%> (ø)
...org/knora/webapi/http/status/ApiStatusCodesZ.scala	0.00% <0.00%> (ø)
...nora/webapi/instrumentation/health/HealthApp.scala	0.00% <0.00%> (ø)
.../knora/webapi/instrumentation/index/IndexApp.scala	0.00% <0.00%> (ø)
...api/instrumentation/prometheus/PrometheusApp.scala	0.00% <0.00%> (ø)
... and 3 more

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

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

[irinaschubert]

What does the CommonR0 and CommonR stand for? R is for "Routes", I guess? What about the 0? Could you write this explicitly? It would be clearer, I guess.

[seakayone]

The names for the parameters come from the signature of the function which uses it:
def makeSome[R0, R]. I am open for suggestions for a better naming.