set PYTHONPATH where needed instead of globally setting it for everything

[smuzaffar]

No description provided.

[cmsbuild]

A new Pull Request was created by @smuzaffar for branch master.

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

[cmsbuild]

cms-bot internal usage

[smuzaffar]

please test with cms-sw/cmsdist#9902

[smuzaffar]

please test with cms-sw/cmsdist#9761

[cmsbuild]

-1

Failed Tests: UnitTests
Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-a72228/47376/summary.html
COMMIT: 9d34818
CMSSW: CMSSW_15_1_X_2025-07-24-1100/el8_amd64_gcc12
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week1/cms-sw/cms-bot/2539/47376/install.sh to create a dev area with all the needed externals and cmssw changes.

Unit Tests

I found 1 errors in the following unit tests:

---> test testDiMuonBiasesPlotting had ERRORS

Comparison Summary

Summary:

• No significant changes to the logs found
• Reco comparison results: 0 differences found in the comparisons
• DQMHistoTests: Total files compared: 1
• DQMHistoTests: Total histograms compared: 0
• DQMHistoTests: Total failures: 0
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 0
• DQMHistoTests: Total skipped: 0
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0 KiB( 0 files compared)
• Checked 0 log files, 0 edm output root files, 1 DQM output files