Revert lhapdf to 6.4.0 but keep lhapdh_dataset 6.5.1c

[smuzaffar]

See cms-sw/cmssw#43526 for detail on this revert.

[cmsbuild]

A new Pull Request was created by @smuzaffar (Malik Shahzad Muzaffar) for branch IB/CMSSW_14_0_X/master.

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

[smuzaffar]

test parameters:

• relval = 132.0
• enable = threading
• relval_threading = 132.0

[smuzaffar]

please test

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-2d68eb/36401/summary.html
COMMIT: 2d114a9
CMSSW: CMSSW_14_0_X_2023-12-10-2300/el8_amd64_gcc12
Additional Tests: THREADING
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week1/cms-sw/cmsdist/8869/36401/install.sh to create a dev area with all the needed externals and cmssw changes.

Comparison Summary

Summary:

• You potentially removed 251 lines from the logs
• Reco comparison results: 23 differences found in the comparisons
• DQMHistoTests: Total files compared: 50
• DQMHistoTests: Total histograms compared: 3430794
• DQMHistoTests: Total failures: 1283
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 3429489
• DQMHistoTests: Total skipped: 22
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 49 files compared)
• Checked 217 log files, 171 edm output root files, 50 DQM output files
• TriggerResults: no differences found

[mkirsano]

I agree with this. revert. I would not be as simple as this to revert the sets.

[smuzaffar]

+externals

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next IB/CMSSW_14_0_X/master IBs (tests are also fine). This pull request will now be reviewed by the release team before it's merged. @rappoccio, @sextonkennedy, @antoniovilela (and backports should be raised in the release meeting by the corresponding L2)