Migrate Pydantic V1 to V2

[nesitor]

Feature: Migrate Pydantic V1 to V2.

Self proofreading checklist

• The new code clear, easy to read and well commented.
• New code does not duplicate the functions of builtin or popular libraries.
• An LLM was used to review the new code and look for simplifications.
• New classes and functions contain docstrings explaining what they provide.
• All new code is covered by relevant tests.
• Documentation has been updated regarding these changes.
• Dependencies update in the project.toml have been mirrored in the Debian package build script packaging/Makefile

Changes

1. We updated model validation in operator.py to use model_validate instead of parse_obj
2. We fixed json methods in resources.py and configuration.py to use model_dump_json instead of json
3. We updated the import from pydantic.json to pydantic_core in models.py
4. We fixed the display method in conf.py to use model_config directly

How to test

Deploy that version on the staging CRNs and ensure that everything is working well.

[codecov]

Codecov Report

Attention: Patch coverage is 87.37864% with 13 lines in your changes missing coverage. Please review.

Project coverage is 64.56%. Comparing base (21a696d) to head (37aad72).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
src/aleph/vm/orchestrator/views/authentication.py	94.59%	1 Missing and 1 partial ⚠️
src/aleph/vm/storage.py	66.66%	2 Missing ⚠️
src/aleph/vm/conf.py	93.33%	1 Missing ⚠️
src/aleph/vm/models.py	0.00%	1 Missing ⚠️
src/aleph/vm/orchestrator/reactor.py	0.00%	1 Missing ⚠️
src/aleph/vm/orchestrator/run.py	50.00%	1 Missing ⚠️
src/aleph/vm/orchestrator/tasks.py	0.00%	1 Missing ⚠️
src/aleph/vm/orchestrator/views/__init__.py	66.66%	1 Missing ⚠️
src/aleph/vm/orchestrator/views/operator.py	0.00%	1 Missing ⚠️
src/aleph/vm/pool.py	50.00%	1 Missing ⚠️
... and 1 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #791      +/-   ##
==========================================
+ Coverage   64.54%   64.56%   +0.02%     
==========================================
  Files          78       78              
  Lines        7087     7092       +5     
  Branches      597      598       +1     
==========================================
+ Hits         4574     4579       +5     
- Misses       2312     2313       +1     
+ Partials      201      200       -1     

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