Feat/epix dark characterization common mode

[EPIX][DARK] add common mode correction.

Description

• Adds common mode correction to dark characterization notebook, improving the sensitivity to bad pixels.
• Noise and bad pixels maps are calculated independently for each ASIC.

How Has This Been Tested?

• Running the notebook
• Command line "xfel-calibrate EPIX100 DARK"

Relevant Documents (optional)

Types of changes

• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

Reviewers