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