Fix MuonCaloTagAlg tool config
Trying to fix ATLASRECTS-7384. Not sure why it did not work before, but it was anyways a bit messy. Maybe the public tool needs to be added before adding to the fragment?
Note that ToolHandleArray
still behaves strangely. It looks private but it requires a public tool. @wlampl, @fwinkl, @leggett, @jchapman any idea?
Do we ever even need an array here?