COMPMID-3393: Minor tweaks on memory injection interface

* Avoid the need to overload workspace() everytime
* Remove the Layer suffix from the operators
* Clean interface by removing default arguments when unsupported

Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Change-Id: I7710ecd485cae13e9c2d45216debbd8103bc5a0f
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/3610
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michalis Spyrou <michalis.spyrou@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
diff --git a/arm_compute/runtime/NEON/INEOperator.h b/arm_compute/runtime/NEON/INEOperator.h
index 004abb2..f913055 100644
--- a/arm_compute/runtime/NEON/INEOperator.h
+++ b/arm_compute/runtime/NEON/INEOperator.h
@@ -55,7 +55,8 @@
 
     // Inherited methods overridden:
     void run(InputTensorMap inputs, OutputTensorMap outputs, OperatorTensorMap workspace) override;
-    void prepare(OperatorTensorMap constants) override final;
+    void prepare(OperatorTensorMap constants) override;
+    MemoryRequirements workspace() const override;
 
 protected:
     std::unique_ptr<INEKernel> _kernel;