Add more features to ECAL DQM & validation module

[tvami]

I am updating ldmx-sw, here are the details.

What are the issues that this addresses?

Resolves #1398

Check List

• I successfully compiled ldmx-sw with my developments
• I ran my developments and the following shows that they are successful.

All the new histos in the histo.root file created by the CI config look as they should tho!
The validation module works too, tho I had to make the changes as in #1441

denv python3 -m Validation compareDir/ --systems ecal.digi_verify
denv python3 -m Validation compareDir/  --systems ecal.mip_tracking
denv python3 -m Validation compareDir/  --systems ecal.veto_results

[tomeichlersmith]

Looks great :) thanks for keeping things separate and organized, I like small and well-defined processors.

[tvami]

Thanks for the quick approval guys! I'll delay merging this bc it changes the gold, after #1442 and #1406 are resolved