Update tracker alignment algs to new Millepede+GBL versions

[goblirsc]

PR description:

This PR updates the CMSSW client code for interacting with Millepede2 and GBL to accomodate the latest updates to said packages.

• new external package dependency for providing the Mille binary file interface.
• removal of CMS-internal copy of Mille class.
• removal of no-longer-needed gbl::MilleRecord instance in MillepedeAlignmentAlgorithm simultaneously talking to the same file as Mille instance (fragile).
• py3-migrate a useful script found along the way.

Dependencies / expected changes / documentation:

• this PR depends on an externals PR, cmsdist:#10310. Both should be tested together.
• no changes to the output are expected. The alignment binaries written by the new Mille version are 1:1 compatible to the existing format.
• Documentation of changes / new features: slides Alignment weekly 26.01.26).

PR validation:

• unit tests (scram b runtests use-ibeos): passing
• runTheMatrix.py -l limited -i all --ibeo: all tests passing except for few failures unrelated to the PR (missing datasets for e/gamma 136.X, DAS errors for 2022.00X-2025.00X)
• alignment campaign with a local build of the modified CMSSW + externals: successful and identical output to existing codebase.

If this PR is a backport please specify the original PR and why you need to backport that PR. If this PR will be backported please specify to which release cycle the backport is meant for:

No backport needed

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

[cmsbuild]

cms-bot internal usage

[cmsbuild]

-code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-49963/47743

ERROR: Build errors found during clang-tidy run.

src/Alignment/MillePedeAlignmentAlgorithm/plugins/MillePedeAlignmentAlgorithm.cc:24:10: error: 'Mille/MilleFactory.h' file not found [clang-diagnostic-error]
   24 | #include "Mille/MilleFactory.h"                                     // external Mille library
      |          ^~~~~~~~~~~~~~~~~~~~~~
Suppressed 1082 warnings (1082 in non-user code).
--
gmake: *** [config/SCRAM/GMake/Makefile.coderules:129: code-checks] Error 2
gmake: *** [There are compilation/build errors. Please see the detail log above.] Error 2

[smuzaffar]

code-checks with cms.week0.PR_6e7d7ce1/100.0-e18971569e0e45b7e8c26c8607cf3bf8

[cmsbuild]

+code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-49963/47759

[cmsbuild]

A new Pull Request was created by @goblirsc for master.

It involves the following packages:

• Alignment/MillePedeAlignmentAlgorithm (alca)
• Alignment/ReferenceTrajectories (alca)
• PhysicsTools/PythonAnalysis (analysis)

@Alejandro1400, @JanChyczynski, @arunhep, @atpathak, @cmsbuild, @perrotta, @tvami can you please review it and eventually sign? Thanks.
@mmusich, @rsreds, @tlampen, @tocheng, @yuanchao this is something you requested to watch as well.
@ftenchini, @mandrenguyen, @sextonkennedy you are the release manager for this.

cms-bot commands are listed here

[perrotta]

test parameters:

• pull_request = Add new "Mille" package to externals, update Millepede-II and GBL  cmsdist#10310

[perrotta]

please test

[tvami]

This is beyond this PR, but I do wonder: is this really meant to be hardcoded at 0.003?