FTF GPU ITk: Add triplet confirmation
Add a fake triplet filter based on duplicates finding:
Criteria for being a duplicate:
- the same inner and middle spacepoint
- outer spacepoints are on different layers
- pT has the same sign
- pT is equal within stddev
Additionally:
- Set FTF useGPU flag based on InnerDetector flag
- Add two more outer layers from volumes 91/71 and 90/70 as possible middle spacepoint layers
The code will be further optimized to fully utilize GPU resources
Related to EFTRACK-76
Tagging @demelian
Edited by Aleksandra Poreba