Fix deprecation warning under Pydantic 2.11

[medaminezghal]

This will fix the PydanticDeprecatedSince211 errors that come from pydantic>=2.11 but it will fails because misteralai should also edit it's code.

[Kludex]

@Viicos previous versions of Pydantic don't support this, right?

[Viicos]

@Viicos previous versions of Pydantic don't support this, right?

This should be working (both keyword and positional argument for config works in <2.11), but the version bump would have to be removed.

[medaminezghal]

@Viicos I solved the problems

[medaminezghal]

@Viicos should I also revert the mistralai version?

[Viicos]

@Viicos should I also revert the mistralai version?

Yes I think so, if the deprecation warning was present in an older mistralai version, it isn't an issue on our end (until we actually bump the minimum supported Pydantic version to 2.11, and as such enable testing on this version).

[medaminezghal]

@Viicos I think it can be merged now if the tests pass

[Viicos]

Thanks @medaminezghal

[medaminezghal]

@Viicos I've made a PR in mistralai package to fix PydanticDeprecatedSince211 that come from it in the tests.