[DD4hep] cleanup file names

[ianna]

PR description:

addresses issue #33373 and comments on #36004

PR validation:

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

Before submitting your pull requests, make sure you followed this checklist:

• verify that the PR is really intended for the chosen branch
• verify that changes follow CMS Naming, Coding, And Style Rules
• verify that the PR passes the basic test procedure suggested in the CMSSW PR instructions

[ianna]

please test

[cmsbuild]

-code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-36021/26472

• This PR adds an extra 216KB to repository

• There are other open Pull requests which might conflict with changes you have proposed:

  • File Configuration/PyReleaseValidation/README.md modified in PR(s): Add run3 tracking low pu era #33532
  • File Configuration/PyReleaseValidation/python/relval_2017.py modified in PR(s): [JMENanoAOD] Rework for Prompt  #35614

Code check has found code style and quality issues which could be resolved by applying following patch(s)

• code-format:
  https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-36021/26472/code-format.patch
  e.g. curl -k https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-36021/26472/code-format.patch | patch -p1
  You can also run scram build code-format to apply code format directly

[ianna]

please test

[qliphy]

@cms-sw/pdmv-l2 This is needed to fix IB issues #36029 Would you please have a quick check?

[kskovpen]

+1

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

[qliphy]

+1