Fix usage of pydantic v1

[jonringer]

Issue #, if available

#3617
Supercedes: #3710

Description of changes

Importing error_wrappers or ValidationError using python's import syntax works as expected as it can also traverse directories and files. However, doing something like from pydantic import v1 as pydantic actually just reads pydantic/v1/__init__.py which just re-exports pydantic namespace (for 1.10.17+) but it DOES NOT re-export error_wrappers, however it does re-export ValidationError which is what we care about.

Description of how you validated changes

Ran test suite with pydantic2, and able to import files with pydantic1

Checklist

• Adheres to the development guidelines
• Add/update transform tests
  • Using correct values
  • Using wrong values
• Add/update integration tests

Examples?

import example:

$ python
Python 3.11.10 (main, Sep  7 2024, 01:03:31) [GCC 13.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import pydantic
>>> pydantic.__version__
'1.10.21'
>>> pydantic.v1.error_wrappers
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: module 'pydantic' has no attribute 'v1'
>>> import pydantic.v1 as p
>>> p
<module 'pydantic.v1' from '/nix/store/fyn8cs661n9mbldsn0w3pb29pf62rprn-python3.11-pydantic-1.10.21/lib/python3.11/site-packages/pydantic/v1/__init__.py'>
>>> p.error_wrappers
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: module 'pydantic.v1' has no attribute 'error_wrappers'
>>> p.ValidationError(
... 
KeyboardInterrupt
>>> p.ValidationError
<class 'pydantic.error_wrappers.ValidationError'>
>>> from pydantic.v1 import error_wrappers
>>> error_wrappers
<module 'pydantic.v1.error_wrappers' from '/nix/store/fyn8cs661n9mbldsn0w3pb29pf62rprn-python3.11-pydantic-1.10.21/lib/python3.11/site-packages/pydantic/v1/error_wrappers.py'>
>>> error_wrappers.ValidationError
<class 'pydantic.error_wrappers.ValidationError'>