Python generator ignores case

Description

-Dcase_option=camel or --additional_properties case_option=camel are ignored during generation of python code.

Swagger-codegen version

latest tag using Docker

Swagger declaration file content or url

docker run --rm -v ${PWD}:/local swaggerapi/swagger-codegen-cli-v3 generate -Dcase_option=camel -i /local/uedei-api-specification-3.8-stable.json -l python -o /local/out

docker run --rm -v ${PWD}:/local swaggerapi/swagger-codegen-cli-v3 generate --additional_properties case_option=camel -i /local/uedei-api-specification-3.8-stable.json -l python -o /local/out

Command line used for generation

docker run --rm -v ${PWD}:/local swaggerapi/swagger-codegen-cli-v3 generate -Dcase_option=camel -i /local/uedei-api-specification-3.8-stable.json -l python -o /local/out

docker run --rm -v ${PWD}:/local swaggerapi/swagger-codegen-cli-v3 generate --additional_properties case_option=camel -i /local/uedei-api-specification-3.8-stable.json -l python -o /local/out

Steps to reproduce

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Related issues/PRs

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Suggest a fix/enhancement

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Start by reproducing the two Docker generation commands with uedei-api-specification-3.8-stable.json and compare Python output with and without case_option=camel. Trace how the Python generator receives that option, then add coverage for the expected camel-case output and confirm both command-line forms behave consistently.