Add REANA workflow file

[tpmccauley]

Not much more to say. This workflow has been tested using reana-client at reana.cern.ch.

[tiborsimko]

I confirm that the workflow works well 👍

and produces ROOT file:

$ reana-client ls -w AOD2NanoAODOutreachTool -h --filter name=output.root
NAME                                                 SIZE      LAST-MODIFIED
CMSSW_5_3_32/src/workspace/AOD2NanoAOD/output.root   8.7 GiB   2023-02-19T19:50:13

Two comments:

1. The step of the workflow is called "test". Perhaps a better name could be "data-production" or "test-data-production" or something?

2. The workflow produces a lot of files:

$ reana-client ls -w AOD2NanoAODOutreachTool | wc -l
1049

Most are from scramming etc located here:

$ reana-client ls -w AOD2NanoAODOutreachTool | grep CMSSW_5_3_32 | wc -l
923

It should not be necessary to keep them for long, so it may be useful to introduce a new workspace file retention configuration in reana.yaml, something like:

workspace:
  retention_days:
    CMSSW_5_3_32: 7

so that the CMSSW_5_3_32 directory would be automatically deleted after 7 days.

P.S. Just an example to be adapted based on what you would wish to preserve for shorter/longer, e.g. remove only CMSSW_5_3_32/.SCRAM, etc.