PixelCabling: Fix configuration of PixelCablingCondAlg.
This is a copy of @ssnyder's MR !24686 (closed) with resolved conflicts and updated references
Original description:
- Setting attributes on a configurable class doesn't work. You need to set attributes of an instance.
- Don't request the CablingMap folder if it's not going to be used (it probably doesn't exist in that case).
- Use COOL for run2, as stated in the comments.
Include fix from Jiri: jmasik/athena@b73891b4
Should address ATLASRECTS-5017 and ATR-19991.