[pnCCD][CORRECT] use DataFile to store aligned corrected data

Same as Jungfrau. Use DataFile to write the corrected/needed datasets in the corrected files.

Description

Use DataFile to write corrected datasets in the CORR files.

• Write exact datasets written before including the gain and image dataset. Would be good to get info from instruments if these are truly needed.
• Rename limit_images to limit_trains and fix it.
• Raise Warnings for missing trains or empty sequence files.

Change in cal_tools.files:

• Write correct sequenceNumber

How Has This Been Tested?

• Tested with reference runs

Relevant Documents (optional)

• Current Master

• This MR

Types of changes

• Bug fix (non-breaking change which fixes an issue)

Checklist:

Reviewers

@kluyvert @schmidtp