Move call to MLAS_CPUIDINFO::GetCPUIDInfo() out of MlasSQNBitGemmDispatchNeon initialization. (#24018)
Move call to `MLAS_CPUIDINFO::GetCPUIDInfo()` out of `MlasSQNBitGemmDispatchNeon` initialization.
Reduce binary size when MatMulNBits op is not included in the build.
I believe the side effect of `MLAS_CPUIDINFO::GetCPUIDInfo()` (e.g., initializing a static object) prevents the linker from discarding the code in a build where the associated MLAS functions are unused.