Replace MuonIdHelpers with MuonStationIndex in AthGeneration project
After !31213 (merged) was merged then xAODMuon
depends on the MuonStationIndex
package
rather than the MuonIdHelpers
package, so the latter can be replaced by the former
in Projects/AthGeneration/pacakage_filters.txt
. Relates to AGENE-1787.