fix: python pydantic unwrap properties

[memdal]

Description

1. Pydantic code generation now checks if data is a dict or an object before getting keys in the unwrap functions.
2. Alias has been removed for unconstrained properties so that Pydantic objects can follow idiomatic casing for the additional_properties property:

MyPydanticObject(
    defined_property=1,
    additional_properties={
        "undefined_property": "2"
    }
)

Checklist

• The code follows the project's coding standards and is properly linted (npm run lint).
• Tests have been added or updated to cover the changes.
• Documentation has been updated to reflect the changes.
• All tests pass successfully locally.(npm run test).

Additional Notes

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[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[jonaslagoni]

@maxplatov want to have another look?

[maxplatov]

Looks good for me

[jonaslagoni]

@all-contributors please add @memdal for code, test

[allcontributors]

@jonaslagoni

@memdal already contributed before to code, test

[jonaslagoni]

@all-contributors please add @maxplatov for review

[allcontributors]

@jonaslagoni

I've put up a pull request to add @maxplatov! 🎉

[asyncapi-bot]

🎉 This PR is included in version 4.0.0-next.63 🎉

The release is available on:

• npm package (@next dist-tag)
• npm package (@next dist-tag)
• GitHub release

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