202202 new features

Description

This MR adds the features I didn't manage to squeeze into the previous big one. Main new features:

• condition checkers to keep constant parameters up to date from control devices (AGIPD, JUNGFRAU) https://git.xfel.eu/calibration/planning/-/issues/106
• more warning lamps to indicate what is going wrong https://git.xfel.eu/calibration/planning/-/issues/137
• double size pixel masking (AGIPD, JUNGFRAU) (didn't create issue, but Marcin asked for this for JUNGFRAU and it was always in requirements for AGIPD)

And some internal things:

• more detailed, consistent specification of which corrections use which constants (and more granular buffer reloading)
• use newest TrainMatcher, disabling source sorting in ShmemTrainMatcher in it without duplicating _maybe_connect_sources
• only import cupy when needed
• use more @property and less hacky attributes
• expect to run in 2.15.2

Given that I squash merged the last major MR, I rebased only the later commits from devel onto master to create the branch in this MR. Hopefully, GitLab shows proper diff. Not the most ergonomic; I should stop relying on devel and switch to working on cleaner feature branches, right?

How Has This Been Tested?

In my Karabo installation (/gpfs/exfel/data/scratch/online_calibration/hammerd/2.15.2/karabo), I've instantiated fake pipelines with MemToPipe devices (templates in PLAYGROUND project hammerd-cal-dev) and messed around. Will continue to do so for some time before removing draft status.

Types of changes

A lot. Refactoring, new features, new devices.

Reviewers

@calibration