Update alpaka to pickup fixes for C++20 and alpaka::Vec [13.1.x]

[fwyzard]

Update alpaka to pick up fix for c++20 (backport #8567).
Minimal backport of fixes and updates to alpaka::Vec (backport #8645).

[fwyzard]

type bugfix

[cmsbuild]

A new Pull Request was created by @fwyzard (Andrea Bocci) for branch IB/CMSSW_13_1_X/master.

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

• Backported from Update alpaka to pickup fix for C++20 #8567

[fwyzard]

backport #8567
backport #8645

[fwyzard]

enable gpu

[fwyzard]

please test

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-86a6b0/34261/summary.html
COMMIT: a9b5f82
CMSSW: CMSSW_13_1_X_2023-08-13-2300/el8_amd64_gcc11
Additional Tests: GPU
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week0/cms-sw/cmsdist/8647/34261/install.sh to create a dev area with all the needed externals and cmssw changes.

Comparison Summary

Summary:

• You potentially added 16 lines to the logs
• Reco comparison results: 8 differences found in the comparisons
• DQMHistoTests: Total files compared: 48
• DQMHistoTests: Total histograms compared: 3186945
• DQMHistoTests: Total failures: 6
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 3186917
• DQMHistoTests: Total skipped: 22
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 47 files compared)
• Checked 207 log files, 159 edm output root files, 48 DQM output files
• TriggerResults: no differences found

GPU Comparison Summary

Summary:

• No significant changes to the logs found
• Reco comparison results: 0 differences found in the comparisons
• DQMHistoTests: Total files compared: 3
• DQMHistoTests: Total histograms compared: 40086
• DQMHistoTests: Total failures: 23
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 40063
• DQMHistoTests: Total skipped: 0
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 2 files compared)
• Checked 8 log files, 6 edm output root files, 3 DQM output files
• TriggerResults: no differences found

[smuzaffar]

+externals

@perrotta @rappoccio feel free to include it for next 13.1.x release

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next IB/CMSSW_13_1_X/master IBs (tests are also fine). This pull request will now be reviewed by the release team before it's merged. @perrotta, @dpiparo, @rappoccio (and backports should be raised in the release meeting by the corresponding L2)

[rappoccio]

+1