backport data-SimTracker-SiStripDigitizer to 80X

[smuzaffar]

it is backport of #2388
Also included changes for useing datafiles from shared area to avoid having duplicates of same data files for different archs

[cmsbuild]

The tests are being triggered in jenkins.
Using cmssw from cms-sw/cmssw#15458
https://cmssdt.cern.ch/jenkins/job/cmsdist-cmssw-test-pr/69/console

[cmsbuild]

A new Pull Request was created by @smuzaffar (Malik Shahzad Muzaffar) for branch IB/CMSSW_8_0_X/stable.

@smuzaffar, @iahmad-khan, @davidlange6 can you please review it and eventually sign? Thanks.
You can sign-off by replying to this message having '+1' in the first line of your reply.
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[cmsbuild]

+1
Tested at: 37fc116
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-2448/69/summary.html

[smuzaffar]

+externals

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next IB/CMSSW_8_0_X/stable IBs (tests are also fine). This pull request requires discussion in the ORP meeting before it's merged. @slava77, @davidlange6, @smuzaffar

[smuzaffar]

backport of #2388