SiPixelFakeLorentzAngleESSource: use built-in appendToDataLabel mechanism

[mmusich]

PR description:

This is a technical follow-up to #36283 (comment).
Using built-in framework mechanism to attach labels to ES products (via appendToDataLabel).

PR validation:

Unit test run.

if this PR is a backport please specify the original PR and why you need to backport that PR:

N/A

[cmsbuild]

+code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-36332/27073

• This PR adds an extra 16KB to repository

[cmsbuild]

A new Pull Request was created by @mmusich (Marco Musich) for master.

It involves the following packages:

• CalibTracker/SiPixelESProducers (alca)

@cmsbuild, @malbouis, @tvami, @yuanchao, @francescobrivio can you please review it and eventually sign? Thanks.
@tocheng, @OzAmram, @ferencek, @mmusich, @dkotlins, @tvami this is something you requested to watch as well.
@perrotta, @dpiparo, @qliphy you are the release manager for this.

cms-bot commands are listed here

[mmusich]

@cmsbuild, please test

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-8d26e8/20930/summary.html
COMMIT: 61ac101
CMSSW: CMSSW_12_2_X_2021-12-01-2300/slc7_amd64_gcc900
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week1/cms-sw/cmssw/36332/20930/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: 4 differences found in the comparisons
• DQMHistoTests: Total files compared: 41
• DQMHistoTests: Total histograms compared: 3041955
• DQMHistoTests: Total failures: 6
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 3041927
• DQMHistoTests: Total skipped: 22
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 40 files compared)
• Checked 175 log files, 37 edm output root files, 41 DQM output files
• TriggerResults: no differences found

[tvami]

+alca

• test pass
• code change in line w PR description

[cmsbuild]

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

[perrotta]

+1

• Technical