Upgrade lhapdf to 6.3.0, sets to 6.3.0f

[mkirsano]

Fixes #7097

[cmsbuild]

A new Pull Request was created by @mkirsano (Mikhail Kirsanov) for branch IB/CMSSW_12_0_X/master.

@cmsbuild, @smuzaffar, @mrodozov, @iarspider can you please review it and eventually sign? Thanks.
@silviodonato, @dpiparo, @qliphy, @perrotta you are the release manager for this.
cms-bot commands are listed here

[mkirsano]

Explicit dowloading of pdf sets reduced to one set MSTW2008nlo68cl

[mkirsano]

please test

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-e75854/16712/summary.html
COMMIT: 74fa74b
CMSSW: CMSSW_12_0_X_2021-07-12-1400/slc7_amd64_gcc900
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week1/cms-sw/cmsdist/7122/16712/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: 38
• DQMHistoTests: Total histograms compared: 2787742
• DQMHistoTests: Total failures: 861
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 2786881
• DQMHistoTests: Total skipped: 0
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 37 files compared)
• Checked 160 log files, 37 edm output root files, 38 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_12_0_X/master IBs (tests are also fine). This pull request will now be reviewed by the release team before it's merged. @silviodonato, @dpiparo, @qliphy, @perrotta (and backports should be raised in the release meeting by the corresponding L2)

[agrohsje]

please test
trying to understand the differences observed in 12_0_0_pre4 and pre6

[smuzaffar]

@agrohsje , this PR has been merged. What do you want to achieve by running tests again?

[agrohsje]

There was a gen validation report on Thursday and there is an issue with TTbar in 12_0_0_pre4 vs 12_0_0_pre6. Other processes don't show it. At some point we fixed PDF in gridpacks. I wanted to see which tests show differences here. Tests are already gone.

[agrohsje]

Problem seems related to a weight update in Pythia 8.3.