Add CLPool3d Int8 Support

- Adds Qasymm8 and Qasymm8_signed support to the 3d pool operator

Resolves: COMPMID-4669
Signed-off-by: Mohammed Suhail Munshi <MohammedSuhail.Munshi@arm.com>
Change-Id: I36038c2b7c4f36baf67f7aae801356890e104538
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/c/VisualCompute/ComputeLibrary/+/410496
Tested-by: bsgcomp <bsgcomp@arm.com>
Reviewed-by: Sheri Zhang <sheri.zhang@arm.com>
Comments-Addressed: bsgcomp <bsgcomp@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/7391
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Gunes Bayir <gunes.bayir@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
diff --git a/SConscript b/SConscript
index 3e5fa2f..620e811 100644
--- a/SConscript
+++ b/SConscript
@@ -446,6 +446,7 @@
                     'src/core/CL/cl_kernels/nhwc/normalize_planar_yuv_layer_quantized.cl',
                     'src/core/CL/cl_kernels/nhwc/pooling_layer.cl',
                     'src/core/CL/cl_kernels/nhwc/pooling_3d_layer.cl',
+                    'src/core/CL/cl_kernels/nhwc/pooling_3d_layer_quantized.cl',
                     'src/core/CL/cl_kernels/nhwc/pooling_layer_quantized.cl',
                     'src/core/CL/cl_kernels/nhwc/reorg_layer.cl',
                     'src/core/CL/cl_kernels/nhwc/scale.cl',