Allow import argilla_server module with pydantic 2.0

[frascuchon]

Description

This PR allows the import of argilla_server modules when the Pydantic v2 package is installed. You can find the related work in the argilla repository

Type of change

(Please delete options that are not relevant. Remember to title the PR according to the type of change)

• New feature (non-breaking change which adds functionality)
• Refactor (change restructuring the codebase without changing functionality)
• Improvement (change adding some improvement to an existing functionality)

How Has This Been Tested

(Please describe the tests that you ran to verify your changes. And ideally, reference tests)

• Test A
• Test B

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
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• I filled out the contributor form (see text above)
• I have added relevant notes to the CHANGELOG.md file (See https://keepachangelog.com/)

[codecov]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (b78613c) 90.13% compared to head (5ba4e11) 90.11%.

Files	Patch %	Lines
src/argilla_server/pydantic_v1/__init__.py	60.00%	2 Missing ⚠️
src/argilla_server/__init__.py	80.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #12      +/-   ##
==========================================
- Coverage   90.13%   90.11%   -0.03%     
==========================================
  Files         187      187              
  Lines        9178     9187       +9     
==========================================
+ Hits         8273     8279       +6     
- Misses        905      908       +3     

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