Rename Quantization/Dequantization kernels/operators to imperative mood

Renames the following kernels/functions
 - [Cl|Cpu]DequantizationKernel -> [Cl|Cpu]DequantizeKernel
 - [Cl|Cpu]Dequantization -> [Cl|Cpu]CpuDequantize
 - [Cl|Cpu]QuantizationKernel -> [Cl|Cpu]QuantizeKernel
 - [Cl|Cpu]Quantization -> [Cl|Cpu]Quantize

Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Change-Id: Ic3c5eb3b7fe28f807294d159830eef99c2dd6219
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/5566
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
diff --git a/src/runtime/CL/functions/CLDequantizationLayer.cpp b/src/runtime/CL/functions/CLDequantizationLayer.cpp
index e0381f9..3b10401 100644
--- a/src/runtime/CL/functions/CLDequantizationLayer.cpp
+++ b/src/runtime/CL/functions/CLDequantizationLayer.cpp
@@ -27,15 +27,15 @@
 #include "arm_compute/core/CL/ICLTensor.h"
 #include "arm_compute/core/KernelDescriptors.h"
 #include "src/core/CL/ICLKernel.h"
-#include "src/runtime/gpu/cl/operators/ClDequantization.h"
+#include "src/runtime/gpu/cl/operators/ClDequantize.h"
 
 namespace arm_compute
 {
 struct CLDequantizationLayer::Impl
 {
-    const ICLTensor                          *src{ nullptr };
-    ICLTensor                                *dst{ nullptr };
-    std::unique_ptr<opencl::ClDequantization> op{ nullptr };
+    const ICLTensor                      *src{ nullptr };
+    ICLTensor                            *dst{ nullptr };
+    std::unique_ptr<opencl::ClDequantize> op{ nullptr };
 };
 
 CLDequantizationLayer::CLDequantizationLayer()
@@ -54,13 +54,13 @@
     _impl->src = input;
     _impl->dst = output;
 
-    _impl->op = std::make_unique<opencl::ClDequantization>();
+    _impl->op = std::make_unique<opencl::ClDequantize>();
     _impl->op->configure(compile_context, input->info(), output->info());
 }
 
 Status CLDequantizationLayer::validate(const ITensorInfo *input, const ITensorInfo *output)
 {
-    return opencl::ClDequantization::validate(input, output);
+    return opencl::ClDequantize::validate(input, output);
 }
 
 void CLDequantizationLayer::run()