We would like to see support for iterating over all configurations and artifacts created by a matrix job.

A typical scenario:

1. Master Job do some init stuff
2. Master Job triggers:
2.1 Matrix job (with a large number of configurations)
2.2 Matrix job finishes
3. Master job now collects the artifacts from the matrix-job and do some post processing.

We need now to add a large amount of copy artifact steps in the master-job. Which is not really manageable.

It would be nice to have a build selector which iterates over all matrix configurations and copies the artifacts to the specified destination path.