FEAT / Expose dark configurations in update_config.py

Expose dark configuration for AGIPD detectors at SPB and MID in update_config.py

Description

How Has This Been Tested?

This was tested on a temporary development webservice at max-exfl015 to update 000000.yaml in calibration_configurations with --thresholds-offset-hard-lg 1 1.

https://git.xfel.eu/gitlab/detectors/calibration_configurations/commit/7fe6e6235a78af39a808dd8f5e5722a24f6ee076

Relevant Documents (optional)

Types of changes

• New feature (non-breaking change which adds functionality)

Checklist:

• My code follows the code style of this project.
• I have updated the documentation accordingly.
• I updated the tests where appropriate.

Reviewers

@calibration