Singularity v46

[bendavid]

Major upgrade of singularity container to v46 (see https://gitlab.cern.ch/bendavid/cmswmassdocker/-/commits/v46?ref_type=tags)

Some small corresponding technical updates which are needed (migrate python tensorflow lite usage to new litert package)

Also fix a few array out of bounds accesses (off by one errors) which caused problems after the ROOT/cling/etc update (but were already bugs previously in principle)

Note that critically now we are back to a situation again where we cannot/should not import tensorflow before the event loop (but we no longer need to)

I will see if a reasonable solution can be found to this stripping off symbols, but it might also be ok like this. (if it happens by mistake narf will detect it and give a descriptive error rather than failing mysteriously/unpredictably)

[bendavid]

(CI will fail until the new container version propagates to cvmfs)

[bendavid]

From the CI, numerical results are 1:1 identical.

There are some minor aesthetic changes to the plots probably related to updated matplotlib, etc.

The only substantive issue I can see so far is that "Preliminary" has disappeared from the plots, probably due to the second line of text getting lost somehow.

Please others have a look as well though.

https://cmsmwbot.web.cern.ch/WMassAnalysis/PRValidation/PR655/2026_02_07/

[bendavid]

Ok the text subtitle issue is fixed. In principle this should be good to go now, but before it's merged first WMass/wums#15 needs to be merged and also we should figure out why the propagation of the updated container to cvmfs beyond CERN seems to be stuck/slow.

[bendavid]

Ok the propagation of CVMFS seems to be ok now (and the was merged) so this one can be merged now unless someone spots any other issues.