[BUG] [python] Python client expects vulnerable urllib3

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
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Description

After #15810 the generated Python client expects urllib3 >= 1.25.3, < 2.1.0.

Except 1.26.19 all these urllib3 have some security vulnerability: https://security.snyk.io/package/pip/urllib3

openapi-generator version

7.5.0

OpenAPI declaration file content or url

N/A

Generation Details

java -jar openapi-generator-cli-7.5.0.jar generate -i .../some/swagger/service.yaml -g python

Steps to reproduce

Generate a Python client.

Related issues/PRs

#15810

Suggest a fix

Start by generating the Python client with the command and OpenAPI input described in the issue, then inspect where the generated client declares its urllib3 version range. Update the dependency constraint to avoid the reported vulnerable versions and verify the generated requirement against urllib3 1.26.19.