llama.cpp

ff02caf9 - ci : cache ROCm installation in windows-latest-cmake-hip (#15887)

ci : cache ROCm installation in windows-latest-cmake-hip (#15887) This commit adds caching of the ROCm installation for the windows-latest-cmake-hip job. The motivation for this is that the installation can sometimes hang and/or not complete properly leaving an invalid installation which later fails the build. By caching the installation hopefully we can keep a good installation available in the cache and avoid the installation step. Refs: https://github.com/ggml-org/llama.cpp/pull/15365