Break up Utils.h a bit to reduce unused code being included everywhere

Move some maths-related things from Utils.h to new Math.h header in utils/math.
Move some routines used for Tensor shape validation to Validate.h

Change-Id: I8ce89fe03ec3ae1b61d1a80c282b8b91eea0cfb3
Signed-off-by: Matthew Bentham <Matthew.Bentham@arm.com>
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/c/VisualCompute/ComputeLibrary/+/524783
Reviewed-by: Gian Marco Iodice <gianmarco.iodice@arm.com>
Tested-by: Viet-Hoa Do <viet-hoa.do@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/9743
Benchmark: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Jakub Sujak <jakub.sujak@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
diff --git a/src/core/helpers/AutoConfiguration.h b/src/core/helpers/AutoConfiguration.h
index 18ffbd6..6656396 100644
--- a/src/core/helpers/AutoConfiguration.h
+++ b/src/core/helpers/AutoConfiguration.h
@@ -26,6 +26,7 @@
 
 #include "arm_compute/core/ITensorInfo.h"
 #include "arm_compute/core/Types.h"
+#include "arm_compute/core/Utils.h"
 
 namespace arm_compute
 {