[MCH] Introduce DCS processor

[aphecetche]

Add two workflows and one check program to deal with MCH DCS data points :

• o2-calibration-mch-dcs-sim-workflow to generate fake random DCS data points
• o2-calibration-mch-dcs-processor-workflow to accumulate those data points, until some condition is satisfied (either on size or duration). Once satisfied, the accumulation is sent to output to be further consumed (typically by the ccdb populator)
• o2-mch-dcs-check-ccdb small program to quickly dump the accumulated MCH DCS data points from the CCDB

[aphecetche]

@shahor02 I assume here the fullCI failure has nothing to do with this PR ?

[davidrohr]

The full CI is currently failing since the container has too little SHM. This had actually been fixed, don't know why it appeared again. I am having a look and pinged also Timo. Hopefully we can fix this today for good...
The current failure is unrelated. The problem with force-merging with red full CI is that then the codechecker and the full system test have not run on the PR.

[aphecetche]

@davidrohr thanks for the info. Actually the fullCI for this PR was apparently attempted on Feb 10 so maybe before the fix ?

[davidrohr]

Indeed, but I have also seen in other new CI runs that it is failing again.