[master] Drop legacy MC generators

[iarspider]

Forward-port of #7803, #7805, #7806, #7807, #7808 to master branch. A prerequisite for cms-sw/cmssw#37813 .

[cmsbuild]

A new Pull Request was created by @iarspider for branch IB/CMSSW_12_4_X/master.

@cmsbuild, @smuzaffar, @aandvalenzuela, @iarspider can you please review it and eventually sign? Thanks.
@perrotta, @dpiparo, @qliphy you are the release manager for this.
cms-bot commands are listed here

[smuzaffar]

test parameters:

• full_cmssw = true
• pull_request = [master] Drop references to legacy generators cmssw#37813

[smuzaffar]

please test

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-2fda6b/24464/summary.html
COMMIT: 32520a1
CMSSW: CMSSW_12_4_X_2022-05-04-2300/slc7_amd64_gcc10
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week1/cms-sw/cmsdist/7844/24464/install.sh to create a dev area with all the needed externals and cmssw changes.

The following merge commits were also included on top of IB + this PR after doing git cms-merge-topic:

• @bsunanda Run3-gex133D Take care of compilation warnings in packages ExternalDecays and PartonShowerVeto of GeneratorInterface cmssw#37803
• @bsunanda Run3-gex133B Try to avoid reference to depreciated EDFilter/EDAnalyzer codes in GeneratorInterface cmssw#37792
• @bsunanda Run3-gex133A Try to avoid compilation issues in 2 test codes of GeneratorInterface cmssw#37780
• @mmusich fix use after scope in DMRChecker::bookResidualsHistogram cmssw#37796
• @bsunanda Run3-gex133C Take care of compilation warnigs in GeneratorInterface/AMPTInterface cmssw#37794
• @wddgit Improve IndexIntoFile for concurrent lumis/runs cmssw#37532

You can see more details here:
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-2fda6b/24464/git-recent-commits.json
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-2fda6b/24464/git-merge-result

Comparison Summary

Summary:

• No significant changes to the logs found
• Reco comparison results: 2974 differences found in the comparisons
• DQMHistoTests: Total files compared: 49
• DQMHistoTests: Total histograms compared: 3700704
• DQMHistoTests: Total failures: 6323
• DQMHistoTests: Total nulls: 1
• DQMHistoTests: Total successes: 3694358
• DQMHistoTests: Total skipped: 22
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.004 KiB( 48 files compared)
• DQMHistoSizes: changed ( 312.0 ): 0.004 KiB MessageLogger/Warnings
• Checked 206 log files, 45 edm output root files, 49 DQM output files
• TriggerResults: found differences in 1 / 48 workflows

[perrotta]

+1

• Tested with [master] Drop references to legacy generators cmssw#37813

[iarspider]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next IB/CMSSW_12_4_X/master IBs (tests are also fine). This pull request will be automatically merged.