[ENH] V1 → V2 API Migration - setups

[EmanAbdelhaleem]

Fixes #1625
Depends on #1576
Related to #1575

Details
This PR implements Setups resource, and refactor its existing functions

[codecov-commenter]

Codecov Report

❌ Patch coverage is 59.57096% with 245 lines in your changes missing coverage. Please review.
✅ Project coverage is 45.88%. Comparing base (99928f8) to head (8c23ab8).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
openml/_api/clients/http.py	59.89%	75 Missing ⚠️
openml/_api/resources/base/versions.py	24.13%	66 Missing ⚠️
openml/_api/resources/tasks.py	21.27%	37 Missing ⚠️
openml/_api/resources/base/fallback.py	24.32%	28 Missing ⚠️
openml/_api/resources/setups.py	72.97%	20 Missing ⚠️
openml/setups/functions.py	40.00%	6 Missing ⚠️
openml/_api/runtime/core.py	83.33%	5 Missing ⚠️
openml/_api/resources/base/base.py	86.20%	4 Missing ⚠️
openml/_api/resources/datasets.py	77.77%	2 Missing ⚠️
openml/_api/__init__.py	75.00%	1 Missing ⚠️
... and 1 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1619      +/-   ##
==========================================
- Coverage   52.75%   45.88%   -6.88%     
==========================================
  Files          36       50      +14     
  Lines        4333     4888     +555     
==========================================
- Hits         2286     2243      -43     
- Misses       2047     2645     +598     

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[EmanAbdelhaleem]

@geetu040 Can you please check if there is something wrong in the get method?
For some reason when I remove the caching from the method in setups/functions and rely on my implementation for the migrated api call, it doesn't work as I receive an HTML not XML response. Although it works fine on the original get_setup method in setups/functions