feat: Add compatible methods for Pydantic V1.8 and V2

[lucianosrp]

Goal

The goal of this PR is to maintain backward compatibility with Pydanitc V1 and V2 without raising any deprecation warnings.

Description

This PR allows to use both V1.8 and V2 without triggering any deprecation warnings
It also allows to keep the current code for V3 (possibly)

The main edits are done in src/firebolt/model/V1/init.py

It introduces a utility function that gets the desired method based on the current pydantic version:

GenericCallable: TypeAlias = Callable[..., Any]

# Using `.VERSION` instead of `.__version__` for backward compatibility:
PYDANTIC_VERSION: Final[int] = int(pydantic.VERSION[0])


def use_if_version_ge(
    version_ge: int,
    obj: Union[pydantic.BaseModel, Type[Model]],
    previous_method: str,
    latest_method: str,
) -> GenericCallable:
    
    if PYDANTIC_VERSION >= version_ge:
        return getattr(obj, latest_method)
    else:
        return getattr(obj, previous_method)

BaseModel configurations are also handled differently:

class FireboltBaseModel(pydantic.BaseModel):
    if PYDANTIC_VERSION >= 2:
        # Pydantic V2 config
        model_config = ConfigDict(populate_by_name=True, from_attributes=True)

    else:
        # Using Pydantic 1.* config class for backwards compatibility
        class Config:
            extra = "forbid"
            allow_population_by_field_name = True  # Pydantic 1.8

Other changes

• All calls to dict are changed to the new version-compatible method model_dict
• All calls to parse_obj are changed to the new version-compatible method parse_model
• All calls to json are changed to the new version-compatible method model_dump_json

Tests

Tested with pydantc==1.8.2 and pydantic==2.6 on Python 3.9

[lucianosrp]

@ptiurin

[ptiurin]

Thank you for the contribution @lucianosrp !

Couple of things I've noticed:

• looks like some of the files were converted to the Windows line endings (CRLF), could you revert it back to LF so the diffs would show the actual code differences?
• Unit tests are failing, please have a look at running pytest tests/unit
• Mypy is failing for what I believe is the same issue as the tests. Have a look at the output of mypy src from the root of the repo.

[lucianosrp]

Great, thanks!

I noticed it is due to the checks being run on python 3.8 instead of 3.9
On my local environmet with 3.9 mypy and pytest are running fine.

I can still procceed to change that line!

I will revert back to LF !

[ptiurin]

I've run checks on Python 3.8 - 3.12 with 1.* and 2.* versions of Pydantic and this change is working. I also didn't see any warnings anymore.
Integration tests have succeeded too.