Moving RecoLocalTracker from Legacy to Thread-Friendly

[cmsbuild]

Changes according to https://twiki.cern.ch/twiki/bin/view/CMSPublic/FWMultithreadedAnalysisEDAnalyzer
Automatically ported from CMSSW_8_1_X #16573 (original by @OlivierBondu).

[cmsbuild]

A new Pull Request was created by @cmsbuild for CMSSW_9_0_X.

It involves the following packages:

RecoLocalTracker/SiStripZeroSuppression

@cmsbuild, @cvuosalo, @slava77, @davidlange6 can you please review it and eventually sign? Thanks.
@makortel, @forthommel, @yduhm, @GiacomoSguazzoni, @gbenelli, @rovere, @VinInn, @nickmccoll, @jlagram, @gpetruc, @OlivierBondu, @threus this is something you requested to watch as well.
@slava77, @smuzaffar you are the release manager for this.

cms-bot commands are listed here #13028

[slava77]

@cmsbuild please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/16410/console

[cmsbuild]

+1
Tested at: 2f497b6
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-16599/16410/summary.html

[cmsbuild]

Comparison job queued.

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-16599/16410/summary.html

Alternative comparison was/were failed for workflow(s):
4.22
9.0