[CI] Add pre-commit hook `isort` to sort Python imports

[jbampton]

"isort is a Python utility / library to sort imports alphabetically and automatically separate into sections and by type."

https://github.com/PyCQA/isort

https://pycqa.github.io/isort/docs/configuration/pre-commit.html

https://pycqa.github.io/isort/docs/configuration/black_compatibility.html

Did you read the Contributor Guide?

• Yes, I have read the Contributor Rules and Contributor Development Guide

Is this PR related to a JIRA ticket?

• No.

What changes were proposed in this PR?

Added another check/test to our pre-commit framework to sort Python imports.

How was this patch tested?

Ran locally: pre-commit run --all-files

Did this PR include necessary documentation updates?

• No, this PR does not affect any public API so no need to change the documentation.