Pf gen jet specifics backport to 105x

[rappoccio]

PR description:

This PR adds PF-like particle fractions to GenJet, at long last. The long shutdown is a good opportunity. It adds 5 floats and 5 ints to GenJet.

Addresses this issue

PR validation:

This is gen-only so I used WF 5.1.

Example of changes:

jet   4: pt  41.1, eta +1.13, energies: ch  32.69 nh   9.38 ce   0.00 ne  28.45 mu   0.00, mults: ch   7 nh   2 ce   0 ne  11 mu   0
jet   5: pt  37.4, eta +1.45, energies: ch  43.99 nh  34.36 ce   0.00 ne   6.96 mu   0.00, mults: ch  10 nh   6 ce   0 ne   2 mu   0
jet   6: pt  12.0, eta +2.78, energies: ch  93.68 nh   0.00 ce   0.00 ne   3.35 mu   0.00, mults: ch   4 nh   0 ce   0 ne   2 mu   0
jet   7: pt   9.2, eta +2.42, energies: ch  46.10 nh   6.16 ce   0.00 ne   0.00 mu  43.57, mults: ch   2 nh   1 ce   0 ne   0 mu   1

if this PR is a backport please specify the original PR:

Backport of this:

#26125

[cmsbuild]

A new Pull Request was created by @rappoccio for CMSSW_10_5_X.

It involves the following packages:

DataFormats/HepMCCandidate
DataFormats/JetReco
RecoJets/JetProducers

@perrotta, @efeyazgan, @perrozzi, @cmsbuild, @slava77, @alberto-sanchez, @qliphy can you please review it and eventually sign? Thanks.
@TaiSakuma, @jdolen, @yslai, @rovere, @jdamgov, @ahinzmann, @nhanvtran, @gkasieczka, @clelange, @schoef, @mariadalfonso, @seemasharmafnal this is something you requested to watch as well.
@davidlange6, @slava77, @fabiocos you are the release manager for this.

cms-bot commands are listed here

• Backported from Pf gen jet specifics #26125

[perrotta]

backport of #26125

[perrotta]

@rappoccio

what is the use case for 10_5_X?
this release will not be used for physics analysis samples

[rappoccio]

Sorry, yes, I didn't realize the release was shifting.