[ARM] MatMulNBits FP16 support - kernels only (microsoft#22806)

### Description
A break down PR of microsoft#22651
Add fp16 kernels.



### Motivation and Context
<!-- - Why is this change required? What problem does it solve?
- If it fixes an open issue, please link to the issue here. -->

cmake/onnxruntime_mlas.cmake

@@ -89,6 +89,7 @@ function(setup_mlas_source_for_windows)
         ${MLAS_SRC_DIR}/sqnbitgemm_kernel_neon_fp32.cpp
         ${MLAS_SRC_DIR}/sqnbitgemm_kernel_neon_int8.cpp
         ${MLAS_SRC_DIR}/fp16_neon_common.cpp
+        ${MLAS_SRC_DIR}/hqnbitgemm_kernel_neon_fp16.cpp
       )
 
       set(mlas_platform_preprocess_srcs
@@ -384,6 +385,7 @@ else()
             ${MLAS_SRC_DIR}/qgemm_kernel_ummla.cpp
             ${MLAS_SRC_DIR}/sbgemm_kernel_neon.cpp
             ${MLAS_SRC_DIR}/fp16_neon_common.cpp
+            ${MLAS_SRC_DIR}/hqnbitgemm_kernel_neon_fp16.cpp
           )
           set_source_files_properties(${MLAS_SRC_DIR}/aarch64/HalfGemmKernelNeon.S PROPERTIES COMPILE_FLAGS " -march=armv8.2-a+fp16 ")
           set_source_files_properties(${MLAS_SRC_DIR}/aarch64/QgemmS8S8KernelSmmla.S PROPERTIES COMPILE_FLAGS " -march=armv8.2-a+i8mm ")
@@ -394,6 +396,7 @@ else()
           set_source_files_properties(${MLAS_SRC_DIR}/pooling_fp16.cpp PROPERTIES COMPILE_FLAGS " -march=armv8.2-a+fp16 ")
           set_source_files_properties(${MLAS_SRC_DIR}/sbgemm_kernel_neon.cpp PROPERTIES COMPILE_FLAGS " -march=armv8.2-a+bf16 ")
           set_source_files_properties(${MLAS_SRC_DIR}/fp16_neon_common.cpp PROPERTIES COMPILE_FLAGS " -march=armv8.2-a+fp16 ")
+          set_source_files_properties(${MLAS_SRC_DIR}/hqnbitgemm_kernel_neon_fp16.cpp PROPERTIES COMPILE_FLAGS " -march=armv8.2-a+fp16 ")
         endif()
 
         if(ONNXRUNTIME_MLAS_MULTI_ARCH)

onnxruntime/core/mlas/lib/fp16_common.h

@@ -64,6 +64,15 @@ MLAS_FORCEINLINE
 MLAS_FLOAT16X4
 MlasLoadFloat16x4(const _mlas_fp16_* Buffer) { return vreinterpret_f16_u16(vld1_u16(Buffer)); }
 
+template <int lane>
+MLAS_FORCEINLINE
+MLAS_FLOAT16X4
+MlasLoadLaneFloat16x4(const _mlas_fp16_* Buffer, MLAS_FLOAT16X4 vec) {
+    return vreinterpret_f16_u16(
+        vld1_lane_u16(Buffer, vreinterpret_u16_f16(vec), lane)
+    );
+}
+
 MLAS_FORCEINLINE
 MLAS_FLOAT16X4
 MlasLoadPartialFloat16x4(const _mlas_fp16_* Buffer, size_t len)
@@ -95,6 +104,14 @@ MlasStoreFloat16x4(_mlas_fp16_* Buffer, MLAS_FLOAT16X4 Vector)
     vst1_u16(Buffer, vreinterpret_u16_f16(Vector));
 }
 
+template <int lane>
+MLAS_FORCEINLINE
+void
+MlasStoreLaneFloat16x4(_mlas_fp16_* Buffer, MLAS_FLOAT16X4 Vector)
+{
+    vst1_lane_u16(Buffer, vreinterpret_u16_f16(Vector), lane);
+}
+
 MLAS_FORCEINLINE
 void
 MlasStorePartialFloat16x4(_mlas_fp16_* Buffer, MLAS_FLOAT16X4 Vector, size_t len)