[python] Encode list query parameters for python pydantic v1 client

[joostsijm]

@cbornet (2017/09) @tomplus (2018/10) @krjakbrjak (2023/02) @fa0311 (2023/10) @multani (2023/10)

I'd like to apply the same solution as PR #20148 for the Python Pydantic v1 generator and have not been able to do a successful build.

PR checklist

• Read the contribution guidelines.
• Pull Request title clearly describes the work in the pull request and Pull Request description provides details about how to validate the work. Missing information here may result in delayed response from the community.
• Run the following to build the project and update samples:

  ./mvnw clean package || exit
  ./bin/generate-samples.sh ./bin/configs/*.yaml || exit
  ./bin/utils/export_docs_generators.sh || exit
  

  (For Windows users, please run the script in Git BASH)
  Commit all changed files.
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[wing328]

https://github.com/OpenAPITools/openapi-generator/actions/runs/13201325996/job/37336001483?pr=20614

please update the samples so that CI can test the change

[wing328]

python tests with updated samples passed via #20677

[wing328]

FYI. Samples updated via 8fb81ea