CTS failures in Android R and Q in GpuAcc in ArgMinMax

CTS failures in Android R and Q in GpuAcc in ArgMinMax

- Fix ambiguosity with select in OpenCL
- Define a new macro for signed integer data type of the same input data type's size. This is needed because some ops (e.g. logical operators) in OpenCL work in this way

Resolves: COMPMID-4116, COMPMID-4110

Signed-off-by: Giorgio Arena <giorgio.arena@arm.com>
Change-Id: I560eda63fce24abd03d061f78f2f2ca951053fd0
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/4898
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>