Add skeleton of ClMatMulLowpNativeMMULKernel

The skeleton code consists of modifications
   - to build the library with the quantized matmul kernel
   - refactoring of some common utilities
   - empty OpenCL Kernels for four configurations ([Lhs, Rhs] X [Nt, t])
   - some validation tests and skeleton for functional tests

Resolves: COMPMID-6473
Change-Id: Id8401f789d34277dceb1f91afd68c9c88275618a
Signed-off-by: Gunes Bayir <gunes.bayir@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/10273
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Viet-Hoa Do <viet-hoa.do@arm.com>
Benchmark: Arm Jenkins <bsgcomp@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
diff --git a/SConscript b/SConscript
index 7bc5aff..fab9b65 100644
--- a/SConscript
+++ b/SConscript
@@ -430,6 +430,7 @@
                        'src/core/CL/cl_kernels/common/mat_mul.cl',
                        'src/core/CL/cl_kernels/common/mat_mul_mmul.cl',
                        'src/core/CL/cl_kernels/common/mat_mul_quantized.cl',
+                       'src/core/CL/cl_kernels/common/mat_mul_quantized_mmul.cl',
                        'src/core/CL/cl_kernels/common/mean_stddev_normalization.cl',
                        'src/core/CL/cl_kernels/common/memset.cl',
                        'src/core/CL/cl_kernels/common/minmax_layer.cl',