Fix automation bug caused by unexpected AZ_Error string: (#1269)

[Pass LookModificationComposite] Could not bind shader buffer index
'm_eyeAdaptation' because it has no attachment.

The error message is now ONLY reported if the RHI is not Null.

Signed-off-by: garrieta <garrieta@amazon.com>

Gems/Atom/RPI/Code/Source/RPI.Public/Pass/RenderPass.cpp

@@ -10,6 +10,7 @@
 *
 */
 
+#include <Atom/RHI/RHIUtils.h>
 #include <Atom/RHI/CommandList.h>
 #include <Atom/RHI/FrameGraphAttachmentInterface.h>
 #include <Atom/RHI/FrameGraphBuilder.h>
@@ -165,7 +166,7 @@ namespace AZ
                     }
                     else
                     {
-                        AZ_Error("Pass System", false, "[Pass %s] Could not bind shader buffer index '%s' because it has no attachment.", GetName().GetCStr(), shaderName.GetCStr());
+                        AZ_Error( "Pass System", AZ::RHI::IsNullRenderer(), "[Pass %s] Could not bind shader buffer index '%s' because it has no attachment.", GetName().GetCStr(), shaderName.GetCStr());
                         binding.m_shaderInputIndex = PassAttachmentBinding::ShaderInputNoBind;
                     }
                 }