Upgrade OpenAPI Generator to v7.18.0 to fix httpx dependency issue in pyproject.toml

[tngotr]

Summary

The current version of OpenAPI Generator (v7.17.0) has a bug where generating Python clients
with library=httpx produces incorrect dependencies in pyproject.toml.

Current Behavior

When generating the Python SDK with httpx library:

• ✅ setup.py correctly lists: "httpx >= 0.28.1"
• ✅ requirements.txt correctly lists: httpx = ">= 0.28.1"
• ❌ pyproject.toml incorrectly lists: "aiohttp (>=3.8.4)" and "aiohttp-retry (>=2.8.3)"

This causes issues when installing with modern package managers (like uv, poetry) that use
pyproject.toml as the source of truth.

Root Cause

The pyproject.toml template in OpenAPI Generator v7.17.0 was not properly updated for the
httpx library option, causing it to generate dependencies for aiohttp instead.

Fix

This was fixed in [OpenAPITools/openapi-generator#22289](https://github.com/OpenAPITools/openapi
-generator/pull/22289), merged on November 6, 2025, and will be included in v7.18.0.

Action Required

Once OpenAPI Generator v7.18.0 is released:

1. Update the generator version in openapi/python.sh:

   OPENAPI_GENERATOR_COMMIT="${OPENAPI_GENERATOR_COMMIT:-v7.18.0}"
   

2. Regenerate the Python SDK to get the corrected pyproject.toml
3. Remove the manual fix currently applied to kubernetes/pyproject.toml and
   kubernetes/test-requirements.txt

Temporary Workaround

The following files have been manually updated as a temporary fix:

• kubernetes/pyproject.toml - Changed aiohttp dependencies to httpx
• kubernetes/test-requirements.txt - Added pytest-asyncio for async test support

These manual changes should be reverted after regenerating with v7.18.0.

References

• Upstream PR: [python] Fix pyproject (poetry 2.x) for httpx OpenAPITools/openapi-generator#22289
• Related Issue: [BUG] [Python] Missing new python-httpx template in v7.16.0 OpenAPITools/openapi-generator#22203
• Current generator version: v7.17.0 (see .openapi-generator/VERSION)
• Target version: v7.18.0 (milestone)