Porting MUON1 to component accumulator
This MR provides a port of the MUON1 derivation to the component accumulator. It is intended that this will be used as a template for the other MCP derivations. As well as the main config fragment, the MR also provides several new config fragments for certain common tools that haven't been previously provided.
Note that the per-event content (slimming) is set the same as for PHYS so currently none of the muon-specific decorations will appear in the output. Since the configuration of this will most likely be shared with other formats, the muon performance team may choose to factor out some of the tools with common settings into a separate config script to make it easier to keep things in synch (e.g. as is done with the thinning tools between PHYS and PHYSLITE).
This MR has no impact on any ongoing production since it is a new format, and it is not used anywhere else. To make validation and fine-tuning by MCP easier, I think we should now merge this rather than trying to do it all via feature branches.