llama : move no_alloc out of llama_hparams (#31141)
* llama : move no_alloc out of llama_hparams
Assisted-by: dsh:llama.cpp/ggml-org/GLM-5.3-Flash-GGUF (2x DGX Spark (RDMA, TP=2))
* cont : clean-up
* cont : clean-up
Assisted-by: dsh:llama.cpp/ggml-org/GLM-5.3-Flash-GGUF (2x DGX Spark (RDMA, TP=2))
* tests : add a no_alloc case to test-llama-context
Assisted-by: dsh:llama.cpp/ggml-org/GLM-5.3-Flash-GGUF (2x DGX Spark (RDMA, TP=2))