llama : add support for BitnetForCausalLM (#7931) #14017

Job	Run time
Push Docker image to Docker Hub (light, .devops/llama-cli.Dockerfile, linux/amd64,linux/arm64)	11m 46s
Push Docker image to Docker Hub (server, .devops/llama-server.Dockerfile, linux/amd64,linux/arm64)	12m 41s
Push Docker image to Docker Hub (full, .devops/full.Dockerfile, linux/amd64,linux/arm64)	24m 38s
Push Docker image to Docker Hub (light-cuda, .devops/llama-cli-cuda.Dockerfile, linux/amd64)	22m 25s
Push Docker image to Docker Hub (server-cuda, .devops/llama-server-cuda.Dockerfile, linux/amd64)	21m 40s
Push Docker image to Docker Hub (full-cuda, .devops/full-cuda.Dockerfile, linux/amd64)	24m 32s
Push Docker image to Docker Hub (light-rocm, .devops/llama-cli-rocm.Dockerfile, linux/amd64,linux...	22m 27s
Push Docker image to Docker Hub (server-rocm, .devops/llama-server-rocm.Dockerfile, linux/amd64,l...	20m 24s
Push Docker image to Docker Hub (full-rocm, .devops/full-rocm.Dockerfile, linux/amd64,linux/arm64)	22m 29s
Push Docker image to Docker Hub (light-intel, .devops/llama-cli-intel.Dockerfile, linux/amd64)	13m 55s
Push Docker image to Docker Hub (server-intel, .devops/llama-server-intel.Dockerfile, linux/amd64)	13m 43s
	3h 30m 40s

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