[9_4_X] Make sure to report an error if process.options.numberOfThreads has wrong type

[makortel]

PR description:

Backport of #41349, title says it all.

PR validation:

Code compiles.

If this PR is a backport please specify the original PR and why you need to backport that PR. If this PR will be backported please specify to which release cycle the backport is meant for:

Backport of #41349

[cmsbuild]

A new Pull Request was created by @makortel (Matti Kortelainen) for CMSSW_9_4_X.

It involves the following packages:

• FWCore/Framework (core)

@cmsbuild, @smuzaffar, @Dr15Jones, @makortel can you please review it and eventually sign? Thanks.
@missirol, @wddgit this is something you requested to watch as well.
@perrotta, @dpiparo, @rappoccio you are the release manager for this.

cms-bot commands are listed here

• Backported from Make sure to report an error if process.options.numberOfThreads has wrong type #41349

[makortel]

@cmsbuild, please test

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-94df1d/32595/summary.html
COMMIT: cc7990e
CMSSW: CMSSW_9_4_X_2023-05-07-0000/slc6_amd64_gcc630
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week0/cms-sw/cmssw/41654/32595/install.sh to create a dev area with all the needed externals and cmssw changes.

Comparison Summary

Summary:

• TriggerResults: no differences found

[perrotta]

backport of #41349

[makortel]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_9_4_X IBs (tests are also fine) and once validation in the development release cycle CMSSW_13_2_X is complete. 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)

[perrotta]

+1