Add convenient interface to mask pixels in detector data

[philsmt]

Just came up in the detector calibration round, some users find it difficult to apply the bad pixels masks produced (e.g. in the offline correction system). The BadPixels enum will be added as part of the CorrectionData interface, and we should make sure there are easy ways to set individual bits and/or retrieve the data already in such a way.

[D4vidH4mm3r]

Dropping some (sorry, internal) links to relevant discussions:

• Thomas recently mentioned the values relating to issue #126033
• Karim brought for calng up that the enum should be somewhere common
• For configurability of bad pixels for AGIPD in calng, I put a bool for each field and AND the bad pixel map with the current selection

As for making it easy to select which fields to apply: Maybe we provide some preset groups? For example one from dark characterization, we'd have a group of OFFSET_OUT_OF_THRESHOLD | NOISE_OUT_OF_THRESHOLD | OFFSET_NOISE_EVAL_ERROR | NO_DARK_DATA.

[JamesWrigley]

Related: #146.

[takluyver]

I'm tempted to say it's a duplicate of #146. 🙂

[philsmt]

Fine by me, but let's keep the mentioning of an easy interface for flipping bits on and off. Working with bit flags can be quite unintuitive, so it should be part of any API.