[13_0_X] bumping up sherpa to 2.2.15

[shimashimarin]

Bumping up Sherpa to 2.2.15 based on the discussion here. Also, this is a backport of #8450.

[cmsbuild]

A new Pull Request was created by @shimashimarin (Jie Xiao) for branch IB/CMSSW_13_0_X/master.

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

[smuzaffar]

please test

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-2a3201/34826/summary.html
COMMIT: 59fd77d
CMSSW: CMSSW_13_0_X_2023-09-19-1100/el8_amd64_gcc11
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week1/cms-sw/cmsdist/8704/34826/install.sh to create a dev area with all the needed externals and cmssw changes.

Comparison Summary

Summary:

• You potentially removed 10 lines from the logs
• Reco comparison results: 17 differences found in the comparisons
• DQMHistoTests: Total files compared: 49
• DQMHistoTests: Total histograms compared: 3283620
• DQMHistoTests: Total failures: 989
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 3282609
• DQMHistoTests: Total skipped: 22
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 48 files compared)
• Checked 213 log files, 164 edm output root files, 49 DQM output files
• TriggerResults: no differences found

[rappoccio]

+1

[rappoccio]

merge