refactor: Migrate PUT /admin/group/<groupIri> to Tapir (DEV-1588)

[mpro7]

Pull Request Checklist

Task Description/Number

Issue Number: DEV-1588

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

[linear]

DEV-1588 DSP-API: Migrate admin/groups routes to tapir

[swarmia]

✅  Linked to Story DEV-1588 · DSP-API: Expose admin/groups routes with ZIO HTTP
➡️  Part of Epic DEV-1380 · C: DSP-API Introduce ZIO HTTP

[codecov]

Codecov Report

Attention: Patch coverage is 97.91667% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 88.66%. Comparing base (eac5751) to head (a1c9e06).
Report is 92 commits behind head on main.

Files	Patch %	Lines
...a/webapi/responders/admin/GroupsResponderADM.scala	97.22%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #3071       +/-   ##
===========================================
+ Coverage   11.74%   88.66%   +76.91%     
===========================================
  Files         246      262       +16     
  Lines       22907    22457      -450     
===========================================
+ Hits         2690    19911    +17221     
+ Misses      20217     2546    -17671     

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[BalduinLandolt]

LGTM