rappoccio

Results 128 comments of rappoccio

Creating a build prototype [here](https://github.com/cms-sw/cmssw/issues/39697). Once we get signoff from RECO and CORE we can start the build process.

Thanks @makortel , yes, I think this can be done at relval submission time.

hold * Will hold until the 12_5 backport is available, otherwise this looks ready.

Status described here: https://github.com/cms-sw/cmssw/issues/39045#issuecomment-1279154838

+1 - Unit test failures are unrelated, will force merge.