Align kernel/operator header layout

- Redirect validate documentation to configure
- Align header names
- Align class layout

Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Change-Id: Ia40f67383826a66e9f9a33745d66805551e31a3a
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/5897
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
diff --git a/src/core/gpu/cl/kernels/ClDepthConcatenateKernel.h b/src/core/gpu/cl/kernels/ClDepthConcatenateKernel.h
index 103ef00..0f40847 100644
--- a/src/core/gpu/cl/kernels/ClDepthConcatenateKernel.h
+++ b/src/core/gpu/cl/kernels/ClDepthConcatenateKernel.h
@@ -40,7 +40,6 @@
 class ClDepthConcatenateKernel : public IClKernel
 {
 public:
-    /** Default constructor */
     ClDepthConcatenateKernel();
     ARM_COMPUTE_DISALLOW_COPY_ALLOW_MOVE(ClDepthConcatenateKernel);
     /** Initialise the kernel's source and destination
@@ -55,11 +54,9 @@
      *
      */
     void configure(const CLCompileContext &compile_context, ITensorInfo *src, unsigned int depth_offset, ITensorInfo *dst);
-    /**  Static function to check if given info will lead to a valid configuration of @ref ClDepthConcatenateKernel
+    /** Static function to check if given info will lead to a valid configuration
      *
-     * @param[in] src          Source tensor info. Data types supported: QASYMM8/QASYMM8_SIGNED/F16/F32
-     * @param[in] depth_offset The offset on the Z axis.
-     * @param[in] dst          Destination tensor info. Data types supported: Same as @p src.
+     * Similar to @ref ClDepthConcatenateKernel::configure()
      *
      * @return a status
      */