L1S(Nano): add subpackage L1TriggerScouting/NanoAOD

[missirol]

PR description:

This PR addresses #50636, moving (most of) the NanoAOD source code specific to L1-Scouting to a new subpackage named L1TriggerScouting/NanoAOD (assigned to L1T and XPOG in cms-sw/cms-bot#2752).

Minor cleanup of #include statements in some of the files involved was also done in the process.

Merely technical, no changes expected.

PR validation:

The nano workflows passed, i.e.

runTheMatrix.py -w nano -l all --ibeos

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:

No backports needed.

[cmsbuild]

cms-bot internal usage

[cmsbuild]

+code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-50941/49346

• There are other open Pull requests which might conflict with changes you have proposed:
  • File Configuration/EventContent/python/EventContent_cff.py modified in PR(s): TICL: Consolidate v5 as Default Configuration and Cleanup Legacy Code #49932
  • File L1TriggerScouting/Utilities/plugins/BuildFile.xml modified in PR(s): BuildFile dependency cleaning, 1st round #50916
  • File PhysicsTools/NanoAOD/python/autoNANO.py modified in PR(s): [Not to merge] Update L1TPh2 ntuple sequence and eventcontent #49477

[cmsbuild]

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

It involves the following packages:

• Configuration/EventContent (operations)
• L1TriggerScouting/NanoAOD (****)
• L1TriggerScouting/Utilities (daq)
• PhysicsTools/NanoAOD (xpog)

The following packages do not have a category, yet:

L1TriggerScouting/NanoAOD
Please create a PR for https://github.com/cms-sw/cms-bot/blob/master/categories_map.py to assign category

@battibass, @cmsbuild, @davidlange6, @emeschi, @fabiocos, @ftenchini, @ftorrresd, @mandrenguyen, @smorovic can you please review it and eventually sign? Thanks.
@Martin-Grunewald, @Mmiglio, @fabiocos, @gpetruc, @mmusich this is something you requested to watch as well.
@ftenchini, @mandrenguyen, @sextonkennedy you are the release manager for this.

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