azure-servicebus needs linting updates for pylint version 3.3.6

**ACTION NEEDED:** This version of pylint will be merged on **2025-10-13**. The build will begin to fail for this library if errors are not fixed.

**Library name:** azure-servicebus
**Pylint version:** 3.3.6
**Pylint Build:** [Link to build (2025-08-24)](https://dev.azure.com/azure-sdk/internal/_build/results?buildId=5255438&view=logs&j=87f850b5-cf15-53c6-370a-4be21ee70ec7&t=b33d1587-3539-5735-af43-e3e62f02ca4b)
**How to fix:** Run the `next-pylint` tox command at the library package-level and resolve the linting errors.
1) `../azure-servicebus>pip install "tox<5"`
2) `../azure-servicebus>tox run -e next-pylint -c ../../../eng/tox/tox.ini --root .`

See the [Pylint Guide](https://github.com/Azure/azure-sdk-for-python/blob/main/doc/dev/pylint_checking.md) for more information.