Restructure emulation tool for r22.0

First restructure of the TrigBtagEmulationTool. The code changes turned out to be more estensive than I was expecting at first. This is mainly just a move around of the code written by @lbeemste and removal of unused pieces of code.

Quite a big MR... it includes the following:

• Introduction of an EmulContext that acts as a storage for jet collections (and of any kind of collection we may want to store in the future). It contains an unordered_map<std::string, std::unique_ptr<IHolder>>, the JetManagers will store and retrieve collections from here
• TrigBtagEmulationJet only stores the jet quantities, as well as a pointer to the original jet and b-tagging objects (takes no ownership)
• TrigBtagEmulationChain only parse the trigger chain definition and stores the set of criteria
• JetManager retrieves jets from the EventContext and stores in the EmulContext a vector of TrigBtagEmulationJet. This is obtained by merging jets and b-jets collections (<jet-collection-name> + <jet-collection-name>"_bJets")
• TrigBtagEmulationTool: moved as many methods to this class. It also owns the NN for FlavourTaggingDiscriminant

Moreover:

• Change of the tool's interface
• Converted presel jets struct to TrigBtagEmulationJet
• Removed support for navigation since it is not used
• Remove support for L1 jets, since for now L1 is not emulated
• Removed JetManagers for EMTopo jets (kept for presel though)
• b-tagging wps are taken directly from https://gitlab.cern.ch/atlas/athena/-/blob/master/Trigger/TrigHypothesis/TrigBjetHypo/python/TrigBjetBtagHypoTool.py and passed to the tool in the JO
• Remapping for NN is configured in the JO instead of hardcoded
• BTaggingLink can be configured in the JO, default is btaggingLink

tagging @dguest