RootStorageSvc + MuonStationIntersectCond + LArCellRec: fixed clang warnings

Vakhtang Tsulaiarequested to merge
tsulaia/athena:main-clang into main
  1. Use of fabs on integer arguments
  2. Missing override keywords
  3. Local variable set but not used

Also fixed the logic in MuonIntersectGeoData::binPlusneighbours()

Edited by Vakhtang Tsulaia

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