azure-batch needs linting updates for pylint version 4.0.4

[azure-sdk]

ACTION NEEDED: This version of pylint will be merged on 2026-04-13. The build will begin to fail for this library if errors are not fixed.

Library name: azure-batch
Pylint version: 4.0.4
Pylint Build: Link to build (2026-01-18)
How to fix: Run the next-pylint tox command at the library package-level and resolve the linting errors.

1. ../azure-batch>pip install "tox<5"
2. ../azure-batch>tox run -e next-pylint -c ../../../eng/tox/tox.ini --root .

See the Pylint Guide for more information.