Add new Run3_ckfPixelLessStep to StandardSequences

[francescobrivio]

PR description:

Add the new Run3_ckfPixelLessStep era (introduced in #38437) to Configuration/StandardSequences/python/Eras.py.

While starting the release validation of CMSSW_12_4_1, @bbilin noticed that the driver was failing with the error:

raise Exception( "'%s' is not a valid option for '--era'. Valid options are %s." % (eraName, validOptions) )
Exception: 'Run3_ckfPixelLessStep' is not a valid option for '--era'. Valid options are 'Run1_pA', 'Run1_peripheralPbPb', 'Run2_50ns', 'Run2_50ns_HIPM', 'Run2_25ns', 'Run2_25ns_HIPM', 'Run2_25ns_peripheralPbPb', 'Run2_HI', 'Run2_2016', 'Run2_2016_HIPM', ....

So the new era was not recognized.
With the input from @mmusich I added the new era (and the modifier) in the (hopefully) correct place.

At the same time the era cfg was wrongly named Era_Run3_ckfPixelLessStep.py instead of Configuration/Eras/python/Era_Run3_ckfPixelLessStep_cff.py. This is fixed in this PR as well.

PR validation:

N/A

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:

Not a backport, a backport to 12_4_X will be needed

[francescobrivio]

FYI @cms-sw/reconstruction-l2

[mmusich]

@mmasciov @slava77

[tvami]

urgent

[tvami]

@cmsbuild please test

• tho nothing tests this anyway...

[cmsbuild]

+code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-38563/30810

• This PR adds an extra 16KB to repository

• There are other open Pull requests which might conflict with changes you have proposed:

  • File Configuration/StandardSequences/python/Eras.py modified in PR(s): Add run3 tracking low pu era #33532, [PPS] Direct simulation as sequence #38280

[cmsbuild]

A new Pull Request was created by @francescobrivio for master.

It involves the following packages:

• Configuration/StandardSequences (operations)

@perrotta, @qliphy, @fabiocos, @davidlange6 can you please review it and eventually sign? Thanks.
@fabiocos, @makortel, @felicepantaleo, @GiacomoSguazzoni, @JanFSchulte, @rovere, @VinInn, @Martin-Grunewald, @missirol, @lecriste, @mtosi, @ebrondol, @mmusich, @dgulhan, @slomeo 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]

can we please add a workflow that tests this?

[tvami]

@cmsbuild , please abort

[francescobrivio]

type bug-fix

[cmsbuild]

+code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-38563/30813

• This PR adds an extra 20KB to repository

• There are other open Pull requests which might conflict with changes you have proposed:

  • File Configuration/StandardSequences/python/Eras.py modified in PR(s): Add run3 tracking low pu era #33532, [PPS] Direct simulation as sequence #38280

[cmsbuild]

Pull request #38563 was updated. @cmsbuild, @perrotta, @qliphy, @fabiocos, @davidlange6 can you please check and sign again.

[mmusich]

duplicate of #38565

[mmasciov]

@francescobrivio, @mmusich, @slava77, @tvami, @bbilin:
this issue is fixed in PR #38565 (and its backport to 124X, PR #38566).
After the second commit, however, this PR is fully equivalent to #38565.
In the description of PR #38565 and PR #38566, a validation is linked, explicitly checking that the new era is fully recognized, and does what's expected.

[francescobrivio]

closing in favor of #38565