New functors to place objects in a vector and to concatenate two vectors

This MR defines two new functors:

• SINGLE : takes an object of type T and return a std::vector<T> containing such object
• CONCATENATE : takes two vectors v1,v2of the same type std:vector<T> and return a single std:vector<T> with { v1_elements, v2_elements }

This will help to distinguish two particles with same ID and Charge when using ThorParticleSelection , for example to compute ConeIsolation variables around each final state track

fields = {
        "Tau"   :   "[tau+ -> mu+ mu+ mu-]CC",
        "L1"  :     "[tau+ -> ^mu+ mu+ mu-]CC",
        "L2"  :     "[tau+ -> mu+ ^mu+ mu-]CC",
        "L3"  :     "[tau+ -> mu+ mu+ ^mu-]CC",
}

data = get_particles(f"/Event/HLT2/Hlt2RD_TauToMuMuMu/Particles")
L1_data = ThOrParticleSelection(
        InputParticles=data, Functor=F.SINGLE @ F.VALUE @ F.FIND_DECAY(fields["L1"])
    ).OutputSelection

added Functors RTA labels

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• afe8e1c8...866c33d4 - 46 commits from branch master
• dd15dd1a - new vector and concat functor
• 45cd45a6 - pre-commit fixes

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• 792738f1 - fix typo in TestFUuctors.cpp

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• 0d43b55a - implemented refactored version of the functors using TrivialFunctor

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marked this merge request as ready

changed the description

requested review from @graven

mentioned in issue Moore#927 (closed)

mentioned in issue Moore#936

changed title from New fuctors to place objects in a vector and to concatenate two vectors to New functors to place objects in a vector and to concatenate two vectors

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• 2c3aa5a4 - remove accidental changes to exampl_test.ref

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• 1665d447 - rename functor PlaceIntoVector to Single

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