[12_4 Bug Fix] Remove GenFilter when pgen_smear is used

[srimanob]

PR description:

Backport of #43561

PR validation:

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:

[cmsbuild]

cms-bot internal usage

[cmsbuild]

A new Pull Request was created by @srimanob (Phat Srimanobhas) for CMSSW_12_4_X.

It involves the following packages:

• Configuration/Applications (operations)

@antoniovilela, @fabiocos, @davidlange6, @cmsbuild, @rappoccio can you please review it and eventually sign? Thanks.
@makortel, @fabiocos, @missirol, @Martin-Grunewald this is something you requested to watch as well.
@sextonkennedy, @antoniovilela, @rappoccio you are the release manager for this.

cms-bot commands are listed here

[srimanob]

@cmsbuild please test

[srimanob]

urgent

Need for production.

[srimanob]

@cms-sw/orp-l2

We just fix this. Would it be possible to merge it when PR passes the test (both master and here), and make new release for 12_4? This will need for production.
FYI @drkovalskyi

[drkovalskyi]

We would like to get it into production asap so that we can use the holiday break to process a special background sample that is need for the new muon identification, used in Run3 analysis aiming Winter conferences.

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-1e7a81/36478/summary.html
COMMIT: 6d369ae
CMSSW: CMSSW_12_4_X_2023-12-10-0000/el8_amd64_gcc10
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week1/cms-sw/cmssw/43562/36478/install.sh to create a dev area with all the needed externals and cmssw changes.

Comparison Summary

Summary:

• You potentially removed 4 lines from the logs
• Reco comparison results: 8 differences found in the comparisons
• DQMHistoTests: Total files compared: 51
• DQMHistoTests: Total histograms compared: 3766083
• DQMHistoTests: Total failures: 7
• DQMHistoTests: Total nulls: 1
• DQMHistoTests: Total successes: 3766053
• DQMHistoTests: Total skipped: 22
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: -0.004 KiB( 50 files compared)
• DQMHistoSizes: changed ( 312.0 ): -0.004 KiB MessageLogger/Warnings
• Checked 212 log files, 167 edm output root files, 51 DQM output files
• TriggerResults: no differences found

[rappoccio]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_12_4_X IBs (tests are also fine) and once validation in the development release cycle CMSSW_14_0_X is complete. This pull request will be automatically merged.