Merge .h and .cc files of RecoParticleFlow/PFTracking plugins

[guitargeek]

PR description:

Part of the series of PRs that merges .h files with the .cc files of the plugins in the RecoParticleFlow subsystem.

This has already been done for the RecoEgamma and RecoEcal subsystem (see e.g. #33935, etc.).

It makes maintaining the plugins much easier and also excludes the possibility to wrongly include plugin header files.

PR validation:

CMSSW compiles.

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

No backport intended.

[cmsbuild]

+code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-34069/23222

• This PR adds an extra 24KB to repository

[cmsbuild]

A new Pull Request was created by @guitargeek (Jonas Rembser) for master.

It involves the following packages:

RecoParticleFlow/PFTracking

@perrotta, @jpata, @cmsbuild, @slava77 can you please review it and eventually sign? Thanks.
@mmarionncern, @makortel, @cbernet, @rovere, @lgray, @lecriste, @hatakeyamak, @ebrondol, @seemasharmafnal this is something you requested to watch as well.
@silviodonato, @dpiparo, @qliphy you are the release manager for this.

cms-bot commands are listed here

[slava77]

@cmsbuild please test

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-8177ec/15839/summary.html
COMMIT: 0dd871b
CMSSW: CMSSW_12_0_X_2021-06-09-1100/slc7_amd64_gcc900
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week0/cms-sw/cmssw/34069/15839/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: 38
• DQMHistoTests: Total histograms compared: 2862520
• DQMHistoTests: Total failures: 7
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 2862491
• DQMHistoTests: Total skipped: 22
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 37 files compared)
• Checked 160 log files, 37 edm output root files, 38 DQM output files
• TriggerResults: no differences found

[jpata]

+reconstruction

• technical, merges plugin .h and .cc under RecoParticleFlow/PFTracking
• I checked that the changes between the .h and .cc are really just copy-paste, and nothing else
• no reco differences (none expected)

[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. @silviodonato, @dpiparo, @qliphy (and backports should be raised in the release meeting by the corresponding L2)

[qliphy]

+1