MuonStationTypeBuilder: silenced clang warning and cleaned some debugging leftovers

Vakhtang Tsulaiarequested to merge
tsulaia/athena:24.0-clang into 24.0

Clang warning was: expression with side effects will be evaluated despite being used as an operand to 'typeid'

Given I removed the throwing of an exception, I also downgraded the severity of the relevant message from ERROR to WARNING

CC @jojungge

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