Fix/pre commit isort

Description

Applies isort fixes for pre-commit checks so that those stop being a source of errors in the future.

Marked as WIP as this requires !417 (merged) to be merged first. I'll rebase (if needed) once that's done.

First step of #36

Ran echo 'nbqa-isort isort' | xargs -n 1 pre-commit run --all-files

How Has This Been Tested?

This change only does:

• nbqa-isort
• isort

Which do modify code, however they only re-order the imports. Additionally, the check-ast step of the pre-commit checks will ensure that we still have valid python code.

Relevant Documents (optional)

Types of changes

Formatting fixes

Checklist:

• My code follows the code style of this project.

Reviewers

@danilevc @ahmedk @hammerd