Draft: Make Muon::TileID formattable with fmtlib

LCG 103a will have fmtlib 10 which is more picky than previous versions.

This MR implements a simple fmtlib customization for Muon::TileID needed to build Run2Support and Boole with LCG 103a.

Note: this is part of a pool related (not interdependent MRs), LHCb!4143 (merged), Run2Support!46 (merged), !397 (closed)