Reference files for addition of BTL v4/new BTL scheme

[fabiocos]

In support of cms-sw/cmssw#47353

[cmsbuild]

A new Pull Request was created by @fabiocos for branch master.

@cmsbuild, @iarspider, @smuzaffar can you please review it and eventually sign? Thanks.
@antoniovilela, @mandrenguyen, @rappoccio, @sextonkennedy you are the release manager for this.
cms-bot commands are listed here

[cmsbuild]

cms-bot internal usage

[smuzaffar]

+externals

this is tested via cms-sw/cmssw#47353 and should be merged one cmssw PR is merged

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next master IBs after it passes the integration tests. This pull request will now be reviewed by the release team before it's merged. @rappoccio, @sextonkennedy, @mandrenguyen, @antoniovilela (and backports should be raised in the release meeting by the corresponding L2)

[cmsbuild]

REMINDER @rappoccio, @mandrenguyen, @antoniovilela, @sextonkennedy: This PR was tested with cms-sw/cmssw#47353, please check if they should be merged together

[mandrenguyen]

+1

[mandrenguyen]

merge