Introduce multi-slice NuGraph2 inference and filtering

[rtriozzi]

This PR integrates additional NuGraph2 modules in ICARUS, including some that were already introduced in Giuseppe's icaruscode PR #815, on which this PR is based, as well as new modules designed to:

• run NuGraph2 on multiple slices (e.g., those that are tagged as not-clear-cosmic by Pandora), based on work by summer intern Leonardo Lena;
• filter hits from Pandora slices based on the NuGraph2 "filter" score.

Along with the modules, a set of FHiCL files is provided. They are all based on the standard v10_06_00_01p01 configurations. Following the review of this PR, similar FHiCL files based on develop will be provided.

More information on NuGraph2 and its applications can be found in SBN DocDB #40585, #44208, Indico.

A companion PR to sbncode is available for dealing with CAF-making after the NG2 filter module (sbncode PR #616).

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Associated PRs

• Handle CAF making when Pandora runs after the NuGraph2 filter sbncode#616

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Review

Tagging for review @acampani and @PetrilloAtWork as reconstruction and infrastructure experts. Thanks a lot!

[acampani]

I suppose this executable and the other one to run on grid are meant to setup tritonserver on the grid/interactively respectibely, but I wanted to understand better what's the scope of both scripts and perhaps I'd recommend adding a short description to both in case people want to use them.

[acampani]

Perhaps I'll clarify this on my own after checking the rest of the code, but I wanted to make sure what some of the labels refer to:
nuslhitsCryoE/W are the hits before nu-graph filtering
NuGraphCryoE/W I guess is a "global object/container" for all nu-graph related reconstruction
NCCSlicesCryoE/W is the "not clear cosmic" single slice considered as the neutrino candidate slice based on the trigger/optical flash
NGMultiSliceCryoE/W corresponds to nu-graph being applied to all non clear cosmic slices in a certain event
ngfilteredhitsCryoE/W corresponds to post-nu-graph-filtering hits
is this interpretation correct?
Perhaps, especially as far as NCCSlicesCryoE/W and NGMultiSliceCryoE/W are concerned at least, I'd add a comment to clarify/specify some details in the fhicl.

[acampani]

Can you clarify how these two fhicl parameters set to false change the settings in pandora?