ATOM-15658 Better option of CreateCommonBuffer requires unique buffer name (#1133)

* ATOM-15658 Better option of CreateCommonBuffer requires unique buffer name
- Change the CreateCommonBuffer function to not require an unique  name by default.
- Remove the code for generating unique buffer names.
- Add buffer name to BufferAsset so it can be used for device object name instead of using asset file name.
- Change RPI::Buffer to use BufferName_AssetUuid as attachment id.

Gems/Atom/Feature/Common/Code/Source/PostProcessing/ExposureControlRenderProxy.cpp

@@ -71,6 +71,7 @@ namespace AZ
                 desc.m_bufferName = bufferName;
                 desc.m_byteCount = sizeof(ShaderParameters);
                 desc.m_elementSize = sizeof(ShaderParameters);
+                desc.m_isUniqueName = true;
 
                 m_buffer = RPI::BufferSystemInterface::Get()->CreateBufferFromCommonPool(desc);
             }