ACTS TF: separate pixel/strip hit/hole/outlier counts/cuts

• New track counts nPixelHits, nStripHits, nPixelHoles, nStripHoles, nPixelOutliers, nStripOutliers.
• New η-dependent selectors minPixelHits, minStripHits, maxPixelHoles, maxStripHoles, maxPixelOutliers, maxStripOutliers.
• Enable with addPixelStripCounts=true.
• Use Athena defaults for these selectors, which for the standard tracking pass are minPixelHits=1, maxPixelHoles=2, maxStripHoles=2. Since maxHoles=2 only the pixel hit count has any effect, and that only to drop strip-seeded tracks without pixel hits.
• For testing in the short term, the old behaviour can be restored with flags.Acts.trackFindingTrackSelectorConfig=4.