Bug: `__dto__` key for `pydantic.Field` is deprecated and will be removed in v3

[sobolevn]

Description

Right now dto_field() sets __dto__ attribute on pydantic.Field: https://github.com/litestar-org/litestar/blob/645e41e787b9cb0697bdb32e2997e9149cc49705/tests/unit/test_contrib/test_pydantic/test_pydantic_dto_factory.py#L20-L22

However, this behavior is deprecated:

tests/unit/test_contrib/test_pydantic/test_pydantic_dto_factory.py::test_field_definition_generation
tests/unit/test_contrib/test_pydantic/test_pydantic_dto_factory.py::test_field_definition_generation
  /home/runner/work/litestar/litestar/.venv/lib/python3.11/site-packages/pydantic/fields.py:792: PydanticDeprecatedSince20: Using extra keyword arguments on `Field` is deprecated and will be removed. Use `json_schema_extra` instead. (Extra keys: '__dto__'). Deprecated in Pydantic V2.0 to be removed in V3.0. See Pydantic V2 Migration Guide at https://errors.pydantic.dev/2.3/migration/
    warn(

Looks like we need to rework how dto_field is set on pydantic.Field

URL to code causing the issue

No response

MCVE

No response

Steps to reproduce

No response

Screenshots

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Logs

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Litestar Version

main

Platform

• [X] Linux
• [X] Mac
• [X] Windows
• [ ] Other (Please specify in the description above)

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[provinzkraut]

@peterschutt, any ideas?

[peterschutt]

@peterschutt, any ideas?

Maybe via Annotated?

[github-actions[bot]]

This issue has been closed in #3289. The change will be included in the upcoming patch release.

[github-actions[bot]]

A fix for this issue has been released in v2.8.0