Enable SAM_FAST model

Enable model:
```
SAMModelName.SAM_FAST: {  # 1024x1024 input resolution
	"registry_name": "vit_h",
	"local_filename": "sam_vit_h_4b8939.pth",
	"download_url": "https://dl.fbaipublicfiles.com/segment_anything/sam_vit_h_4b8939.pth",
	"sha_sum": "a7bf3b02f3ebf1267aba913ff637d9a2d5c33d3173bb679e46d9f338c26f262e",
}
```