COMPMID-1727: CL: Implement Gather - support S32 indices

Change-Id: Ib0298dc75d25acf8db2262c0ab73ecaa6fec636c
Reviewed-on: https://review.mlplatform.org/522
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
4 files changed