Update backend test durations

What is in this MR

An update for test durations

As per our notion docs:

Occasionally rebalance the test_durations file to speed up CI

1. Make a new MR on develop
2. Run in your backend lint test tab make test-regenerate-ci-durations
3. Commit and merge the changes to the test_durations file that will have been made
4. This file is used by our CI to split pytest tests across the 5 parallel pytest backend job tasks. It needs to split them evenly by duration to ensure the fastest possible time.

How to test this MR

• I'm not sure 🤔.

Merge Request Checklist

• changelog.md has been updated if required.
• New/updated Premium/Enterprise features are separated correctly in the premium or enterprise folder
• The latest Chrome and Firefox have been used to test any new frontend features
• Documentation has been updated
• Quality Standards are met
• Performance: tables are still fast with 100k+ rows, 100+ field tables
• The redoc API pages have been updated for any REST API changes
• Our custom API docs are updated for changes to endpoints accessed via api tokens
• The UI/UX has been updated following UI Style Guide