chore: Add facial landmarks and gaze models

Add intermediate representation (IR) of facial landmarks detection model and gaze estimation model in FP16 precision.

files of IR of Facial landmark detection model:
- landmarks-regression-retail-0009.bin
- landmarks-regression-retail-0009.xml

files of IR of Gaze estimation model:
- gaze-estimation-adas-0002.bin
- gaze-estimation-adas-0002.xml

Author: Dewalade1