[12_4_X] Cherry-pick ROOT fixes for forward compatibility

[iarspider]

Cherry-pick changes from root-project/root#10642 and root-project/root#12845

[iarspider]

please test

[cmsbuild]

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

@iarspider, @smuzaffar, @aandvalenzuela can you please review it and eventually sign? Thanks.
@sextonkennedy, @rappoccio, @antoniovilela you are the release manager for this.
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[cmsbuild]

cms-bot internal usage

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-4400c5/37375/summary.html
COMMIT: 6e5d61c
CMSSW: CMSSW_12_4_X_2024-02-11-0000/el8_amd64_gcc10
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week0/cms-sw/cmsdist/9007/37375/install.sh to create a dev area with all the needed externals and cmssw changes.

Comparison Summary

Summary:

• You potentially removed 14 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: 8
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 3766053
• DQMHistoTests: Total skipped: 22
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 50 files compared)
• Checked 212 log files, 167 edm output root files, 51 DQM output files
• TriggerResults: no differences found

[smuzaffar]

+externals

@makortel , as suggested in cms-sw/cmssw#43882 , this includes root-project/root#10642 and root-project/root#12845 for 12.4.X . Tests look good and I am fine with including it for next 12.4.X IB. Do you want to run any tests before we merge it. cmssw PR area based on this change is available under /cvmfs/cms-ci.cern.ch/week0/cms-sw/cmsdist/9007/37375

[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 now be reviewed by the release team before it's merged. @sextonkennedy, @rappoccio, @antoniovilela (and backports should be raised in the release meeting by the corresponding L2)

[antoniovilela]

+1