Add the hardsigmoid and hardswish operators to Vulkan backend#15762

0cc4m merged 2 commits intoggml-org:masterggml-org/llama.cpp:masterfrom

relent95:add-ggml-vulkan-hardsigmoidrelent95/llama.cpp:add-ggml-vulkan-hardsigmoidCopy head branch name to clipboard