[126X] Vertex smearing for PbPb MC based on 2022 PbPb data

[boundino]

PR description:

This PR adds a vertex smearing for 2022 PbPb MC.
The vertex positions use the beamspot in 2022 PbPb data along with the BPIX barycentre provided by Tracker Alignment group. Details see CMS-Talk. The width parameters (sigmaZ) are taken from 2022 PbPb, which is quite close to what we got in 2018.

If this PR is a backport please specify the original PR and why you need to backport that PR. If this PR will be backported please specify to which release cycle the backport is meant for:

This is a backport of #40496

[cmsbuild]

A new Pull Request was created by @boundino (Jing Wang) for CMSSW_12_6_X.

It involves the following packages:

• Configuration/StandardSequences (operations)
• IOMC/EventVertexGenerators (simulation)

@perrotta, @rappoccio, @civanch, @mdhildreth, @cmsbuild, @fabiocos, @davidlange6 can you please review it and eventually sign? Thanks.
@fabiocos, @VourMa, @makortel, @felicepantaleo, @GiacomoSguazzoni, @JanFSchulte, @rovere, @VinInn, @Martin-Grunewald, @missirol, @grzanka, @mmusich, @sameasy, @mtosi, @dgulhan, @slomeo this is something you requested to watch as well.
@perrotta, @dpiparo, @rappoccio you are the release manager for this.

cms-bot commands are listed here

[civanch]

please test

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-11bb81/30195/summary.html
COMMIT: 183b437
CMSSW: CMSSW_12_6_X_2023-01-26-1100/el8_amd64_gcc10
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week1/cms-sw/cmssw/40621/30195/install.sh to create a dev area with all the needed externals and cmssw changes.

Comparison Summary

Summary:

• No significant changes to the logs found
• Reco comparison results: 6 differences found in the comparisons
• DQMHistoTests: Total files compared: 48
• DQMHistoTests: Total histograms compared: 3458651
• DQMHistoTests: Total failures: 9
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 3458620
• DQMHistoTests: Total skipped: 22
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 47 files compared)
• Checked 206 log files, 158 edm output root files, 48 DQM output files
• TriggerResults: no differences found

[civanch]

+1

[perrotta]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_12_6_X IBs (tests are also fine) and once validation in the development release cycle CMSSW_13_0_X is complete. This pull request will be automatically merged.