Fixed material canvas crash when switching pipelines plus fixes missing meshes (#15439)

Signed-off-by: moudgils <[email protected]>

AutomatedTesting/Registry/material_pipelines.setreg

@@ -4,7 +4,8 @@
             "RPI": {
                 "MaterialPipelineFiles": [
                     "@gemroot:Atom_Feature_Common@/Assets/Materials/Pipelines/MainPipeline/MainPipeline.materialpipeline",
-                    "@gemroot:Atom_Feature_Common@/Assets/Materials/Pipelines/LowEndPipeline/LowEndPipeline.materialpipeline"
+                    "@gemroot:Atom_Feature_Common@/Assets/Materials/Pipelines/LowEndPipeline/LowEndPipeline.materialpipeline",
+                    "@gemroot:Atom_Feature_Common@/Assets/Materials/Pipelines/MultiView/MultiViewPipeline.materialpipeline"
                 ]
             }
         }

Gems/Atom/Feature/Common/Assets/Textures/VRSTexture.attimage

@@ -12,7 +12,7 @@
                 "Width": 64,
                 "Height": 64
             },
-            "Format": 24
+            "Format": "R8_UINT"
         },
         "Name": "$VrsTexture",
         "IsUniqueName": true

Gems/Atom/RHI/Code/Source/RHI/ValidationLayer.cpp

@@ -26,7 +26,7 @@ namespace AZ
 
         ValidationMode ReadValidationMode()
         {
-#if 1 //JJS defined(AZ_RELEASE_BUILD)
+#if defined(AZ_RELEASE_BUILD)
             // Always disabled in Release configuration.
             return ValidationMode::Disabled;
 #else