Revert "Revert "[vecgeom] Disable aggressive compiler optimizations""

[perrotta]

Reverts #7998
That is: move the compiler flag for VecGeom to the non-aggressive "-O2" from now on in the master release

[cmsbuild]

A new Pull Request was created by @perrotta (Andrea Perrotta) for branch IB/CMSSW_12_5_X/master.

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

[perrotta]

assign simulation
(please @cms-sw/simulation-l2 sign, even without waiting for running the tests, to certify that the plan is still to disable the "aggressive" compiler optimization since now in the master)

[cmsbuild]

New categories assigned: simulation

@mdhildreth,@civanch you have been requested to review this Pull request/Issue and eventually sign? Thanks

[civanch]

+1

[perrotta]

merge

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-40893c/26341/summary.html
COMMIT: c7435a7
CMSSW: CMSSW_12_5_X_2022-07-19-2300/el8_amd64_gcc10
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week0/cms-sw/cmsdist/8000/26341/install.sh to create a dev area with all the needed externals and cmssw changes.

The following merge commits were also included on top of IB + this PR after doing git cms-merge-topic:

• @cms-sw Revert "[vecgeom] Disable aggressive compiler optimizations" #7998

You can see more details here:
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-40893c/26341/git-recent-commits.json
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-40893c/26341/git-merge-result

Comparison Summary

Summary:

• No significant changes to the logs found
• Reco comparison results: 2 differences found in the comparisons
• DQMHistoTests: Total files compared: 50
• DQMHistoTests: Total histograms compared: 3662417
• DQMHistoTests: Total failures: 8
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 3662387
• DQMHistoTests: Total skipped: 22
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 49 files compared)
• Checked 208 log files, 45 edm output root files, 50 DQM output files
• TriggerResults: no differences found