llama.cpp b9824 release: binary renaming and new builds

The llama.cpp project has released version b9824, which includes improvements to the rpc-server and export-graph-ops binaries. The `export-graph-ops` tool is renamed to follow test naming conventions, while `rpc-server` is renamed to `ggml-rpc-server` to avoid conflicts in system directories.

The release provides pre-built binaries for macOS (Apple Silicon and Intel), iOS, Linux (Ubuntu x64, arm64, s390x with CPU, Vulkan, ROCm 7.2, OpenVINO, and SYCL backends), Android (arm64), Windows (CPU, OpenCL Adreno, CUDA 12/13, Vulkan, OpenVINO, SYCL, HIP), and openEuler.

macOS Apple Silicon builds with KleidiAI support are currently disabled in this release.