[PERF] argilla server: Reduce general transaction time

[frascuchon]

Description

• Remove unnecessary extra SAVEPOINTS
• Move out of the commit all search index operations
• the refresh parameter for es can be set to wait_for instead of true since index operations are out of transactions. This will help with the es performance.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Refactor (change restructuring the codebase without changing functionality)
• Improvement (change adding some improvement to an existing functionality)
• Documentation update

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 91.46341% with 7 lines in your changes missing coverage. Please review.

Project coverage is 91.24%. Comparing base (66454e8) to head (dc7cb1a).
Report is 1 commits behind head on develop.

Files with missing lines	Patch %	Lines
...lla-server/src/argilla_server/contexts/accounts.py	42.85%	4 Missing ⚠️
...ver/src/argilla_server/search_engine/opensearch.py	0.00%	2 Missing ⚠️
.../src/argilla_server/search_engine/elasticsearch.py	66.66%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #5609      +/-   ##
===========================================
+ Coverage    91.21%   91.24%   +0.03%     
===========================================
  Files          145      145              
  Lines         6065     6032      -33     
===========================================
- Hits          5532     5504      -28     
+ Misses         533      528       -5     

Flag	Coverage Δ
argilla-server	91.24% <91.46%> (+0.03%)	⬆️

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