Bump MNN KleidiAI ukernel to qai8_qsi4_sme2 ukernel #3101
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Add logic to select ukernels based on modelInfo and CPUInfo in mnn_kleidiai.cpp. Move some pack functions to mnn_kleidiai_util.cpp. Add CPU feature detect in source/backend/cpu/CPURuntime.hpp. Thread number will be forced to 1 when SME2 is enabled, for better energy efficiency ratio.
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Add logic to select ukernels based on modelInfo and CPUInfo in mnn_kleidiai.cpp. Move some pack functions to mnn_kleidiai_util.cpp.
Add CPU feature detect in source/backend/cpu/CPURuntime.hpp.
Thread number will be forced to 1 when SME2 is enabled, for better energy efficiency ratio.