Update Run3 reco ART tests to use latest BIS78 MDT calib DB

Merged Nicolas Koehler requested to merge nkoehler/athena:muArtBis78 into 21.3

Hi,

this MR updates the Run3 reco ART tests to use the latest BIS78 MDT calib DB. The same update to master happens in !41294 (merged).

Best, Nico

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