[125X] Split L1TMuonPhase2/Constants.h header and move Phase2L1GMT private headers in to plugins

[smuzaffar]

backport of #39396

[smuzaffar]

please test

[cmsbuild]

A new Pull Request was created by @smuzaffar (Malik Shahzad Muzaffar) for CMSSW_12_5_X.

It involves the following packages:

• DataFormats/L1TMuonPhase2 (l1)
• L1Trigger/Phase2L1GMT (l1)

@epalencia, @rekovic, @cecilecaillol can you please review it and eventually sign? Thanks.
@JanFSchulte, @rovere, @eyigitba, @Martin-Grunewald, @missirol, @thomreis, @dinyar 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

• Backported from Split L1TMuonPhase2/Constants.h header and move Phase2L1GMT private headers in to plugins #39396

[cecilecaillol]

+l1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_12_5_X IBs after it passes the integration tests and once validation in the development release cycle CMSSW_12_6_X is complete. This pull request will now be reviewed by the release team before it's merged. @perrotta, @dpiparo, @rappoccio (and backports should be raised in the release meeting by the corresponding L2)

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-6a9d70/27590/summary.html
COMMIT: d8e290d
CMSSW: CMSSW_12_5_X_2022-09-15-2300/el8_amd64_gcc10
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week0/cms-sw/cmssw/39410/27590/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: 0 differences found in the comparisons
• DQMHistoTests: Total files compared: 51
• DQMHistoTests: Total histograms compared: 3695824
• DQMHistoTests: Total failures: 2
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 3695800
• DQMHistoTests: Total skipped: 22
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 50 files compared)
• Checked 212 log files, 49 edm output root files, 51 DQM output files
• TriggerResults: no differences found

[perrotta]

+1