Updating the SimpleTableProducers

[francescobrivio]

PR Description

With the merging of cms-sw/cmssw#44782, the SimpleFlatTableProducers are moved to concrete (explicit) data types.
So running (for example) the NtupleProducer/python/scouting/runW3PiNtuples_cfg.py script on a Phase2Spring24 file I get the following error:

----- Begin Fatal Exception 22-Oct-2024 18:45:20 CEST-----------------------
An exception of category 'Configuration' occurred while
   [0] Constructing the EventProcessor
   [1] Constructing module: class=SimpleCandidateFlatTableProducer label='genPiTable'
Exception Message:
Expression parser error:no method or data member named "statusFlags" found for type "reco::Candidate"
It has the following methods
 charge
 eta
 mass
 pdgId
 phi
----- End Fatal Exception -------------------------------------------------
...

With this PR this particular crash is solved.

---

[RFC]
For the moment I only updated SimpleCandidateFlatTableProducer to SimpleGenParticleFlatTableProducer for the cases where the input source is genParticles, but, judging from the PR, more might need to be updated. FYI @gpetruc @cerminar

[cerminar]

Thanks @francescobrivio. I guess this would break the current L1T recipe described in the README based on CMSSW_14_0_0_pre and currently used by many.
I just created a 14_2_X branch.
Could you also open a PR against that branch?

[francescobrivio]

Yes of course you are right! I'll move the PR to the 14_2_X branch later today!

[francescobrivio]

Closing in favor of #73