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/NEON/functions/NEDequantizationLayer.cpp b/src/runtime/NEON/functions/NEDequantizationLayer.cpp
index 210fbe0..91e3759 100644
--- a/src/runtime/NEON/functions/NEDequantizationLayer.cpp
+++ b/src/runtime/NEON/functions/NEDequantizationLayer.cpp
@@ -26,15 +26,15 @@
 
 #include "arm_compute/core/Validate.h"
 #include "arm_compute/runtime/Tensor.h"
-#include "src/runtime/cpu/operators/CpuDequantization.h"
+#include "src/runtime/cpu/operators/CpuDequantize.h"
 
 namespace arm_compute
 {
 struct NEDequantizationLayer::Impl
 {
-    const ITensor                          *src{ nullptr };
-    ITensor                                *dst{ nullptr };
-    std::unique_ptr<cpu::CpuDequantization> op{ nullptr };
+    const ITensor                      *src{ nullptr };
+    ITensor                            *dst{ nullptr };
+    std::unique_ptr<cpu::CpuDequantize> op{ nullptr };
 };
 
 NEDequantizationLayer::NEDequantizationLayer()
@@ -47,13 +47,13 @@
 {
     _impl->src = input;
     _impl->dst = output;
-    _impl->op  = std::make_unique<cpu::CpuDequantization>();
+    _impl->op  = std::make_unique<cpu::CpuDequantize>();
     _impl->op->configure(input->info(), output->info());
 }
 
 Status NEDequantizationLayer::validate(const ITensorInfo *input, const ITensorInfo *output)
 {
-    return cpu::CpuDequantization::validate(input, output);
+    return cpu::CpuDequantize::validate(input, output);
 }
 
 void NEDequantizationLayer::run()