Optimizing the confidence map alignment

[OanaMariaVatavu]

Adding

1. Confidence map improvements(device level) for
   • U8 case (standard LR-check)
     - 30+ FPS at full resolution
   • U16 case (LR-check + subpixel)
     - 28 FPS at THE_720_P resolution (limited by subpixel calculation+unoptimised threshold SW Filter)
     - 25 FPS at THE_800_P resolution (limited by subpixel calculation+unoptimised thresholding SW Filter)
2. A new example(rgb_depth_confidence_aligned.cpp) to validate the confidence alignment

Modify

• Confidence map alignment according to the RGB-depth alignment

[ToDo]

• Optimizing the thresholding SW Filter - will follow up in a different PR