Fix naming of PixelClusterNnCondAlg

Walter Lamplrequested to merge
wlampl/athena:fixATLASRECTS-5013 into master

global replacement 'PixelNnClusterNnCondAlg'-> 'PixelClusterNnCondAlg' and 'PixelNnClusterNnWithTrackCondAlg' -> 'PixelClusterNnWithTrackCondAlg' to fix ATLASRECTS-5013

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