JetTagCalibration: migrate trigger use-case to CA

Migrate the trigger "scheme" of JetTagCalibConfig to CA-based configuration. Based on the comments, this had been attempted before. For it to work one needs to make use of appendCAtoAthena in the trigger menu code, but take care of handling the main algorithms separately.

Delete the unused ConfigFlags.BTagging.Run3NewTrigTaggers flag and remove the work-around from runHLT_standalone.py as now everything is setup correctly within the bjet trigger menu sequence.

Finally, also cleanup the offline use-case by using addFoldersSplitOnline which handles the connection names correctly.

cc @cnass