Added FORCE_LINK to pytorch custom ops libraries

[valsdav]

Related to #9624.

Added FORCE_LINK to PyTorch scatter/sparse/cluster libraries so that symbols are found at runtime by PyTorch JIT

[cmsbuild]

A new Pull Request was created by @valsdav for branch IB/CMSSW_15_0_X/master.

@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

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-05e6e8/43960/summary.html
COMMIT: 8bffe3b
CMSSW: CMSSW_15_0_X_2025-01-26-2300/el8_amd64_gcc12
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week0/cms-sw/cmsdist/9633/43960/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: 49
• DQMHistoTests: Total histograms compared: 3819085
• DQMHistoTests: Total failures: 45
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 3819020
• DQMHistoTests: Total skipped: 20
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 48 files compared)
• Checked 214 log files, 184 edm output root files, 49 DQM output files
• TriggerResults: no differences found

[smuzaffar]

+externals

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next IB/CMSSW_15_0_X/master IBs (tests are also fine). This pull request will now be reviewed by the release team before it's merged. @rappoccio, @antoniovilela, @mandrenguyen, @sextonkennedy (and backports should be raised in the release meeting by the corresponding L2)