* ci : run test-backend-ops as a dedicated gg test
Run test-backend-ops as a separate gg test in ci/run.sh so it is executed outside ctest. With GG_BUILD_HIGH_PERF it keeps the existing CPU-only invocation (-b CPU); otherwise it runs all available backends without a backend filter.
Remove the dedicated backend-ops workflow and keep test-backend-ops as a built target that is not registered with ctest to avoid duplicate runs.
Assisted-by: pi:llama.cpp/DeepSeek-V4-Flash-Vision-Exp
* ci : run test-backend-ops earlier and enable high-perf on kleidiai
Move the test-backend-ops gg test before test-llama-archs.
Enable GG_BUILD_HIGH_PERF and LLAMA_ARG_THREADS on the Graviton4 KleidiAI job and use the standard self-hosted results/mnt paths.
Add TODO markers for decoupling tests from libllama.
Assisted-by: pi:llama.cpp/DeepSeek-V4-Flash-Vision-Exp
* ci : run test-backend-ops in parallel
Pass -j $(nproc) to test-backend-ops in both high-perf and all-backend modes.
Assisted-by: pi:llama.cpp/DeepSeek-V4-Flash-Vision-Exp
* ci : disable parallel tests for ROCm
* cont : disable parallel tests with MoltenVK
