Luminosity-related functionality

Code for evaluating efficiencies using MC, including MC truth matching, linker tables, etc.

Changes to monitoring infrastructure or usage

This MR requires a reference update of the Allen references

Fixing the issue or merging the MR requires a change in the DB

Merging this would make the stack incompatible with the latest released Gaudi

Requires update of references

No potential reviewers are available

Waiting for a test to be added in the same or in another project.

Issues and MRs to be discussed and followed at the PAC meeting.

Saving and reading information to and from files.