[DRAFT] [REFACTOR] argilla-server: move search logic to search service

[frascuchon]

Description

This PR cleans and moves all logic from search endpoint handlers to a Search service.

Update

The code will probably be moved to under the search context module.

Type of change

• Refactor (change restructuring the codebase without changing functionality)

How Has This Been Tested

Checklist

• I added relevant documentation
• I followed the style guidelines of this project
• I did a self-review of my code
• I made corresponding changes to the documentation
• I confirm My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• I have added relevant notes to the CHANGELOG.md file (See https://keepachangelog.com/)

[codecov]

Codecov Report

Attention: Patch coverage is 98.43750% with 3 lines in your changes missing coverage. Please review.

Project coverage is 91.09%. Comparing base (bca45ff) to head (edc0fe0).

Files	Patch %	Lines
...gilla-server/src/argilla_server/services/search.py	97.72%	2 Missing ⚠️
...lla-server/src/argilla_server/validators/search.py	98.41%	1 Missing ⚠️

Additional details and impacted files

@@                                    Coverage Diff                                     @@
##           refactor/argilla-server/list-records-endpoint-using-db    #5174      +/-   ##
==========================================================================================
- Coverage                                                   91.22%   91.09%   -0.14%     
==========================================================================================
  Files                                                         142      144       +2     
  Lines                                                        5746     5793      +47     
==========================================================================================
+ Hits                                                         5242     5277      +35     
- Misses                                                        504      516      +12     

Flag	Coverage Δ
argilla-server	91.09% <98.43%> (-0.14%)	⬇️

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