Beam attenuation

[Dan Henriksen (dihenriksen)]

Mainly, this PR creates the ability to attenuate a beam by giving control over a set of attenuators:

• Made AttenuatorBank, Attenuator, and other helper classes
• Implemented movable protocol for those classes to control individual attenuators, and to set total attenuation
• Tests for attenuation functionality

Also fixed various other issues:

• Ignore test_eiger_async tests for now since they are very broken
• Update ophyd-async version to match what is in cdi-profile-collection
• Fix style problems
• Remove python 3.10 from supported python versions due to compatibility issues with the latest version of ophyd-async

[Jakub Wlodek (jwlodek)]

Marked some suggestions. Mainly I'd recommend making both device classes Movables and re-work the current methods for changing states into a set method override.