[2023.3][URP] Fixing a NullReferenceException when logging an error in Server Builds (UUM-56965)

When running server builds calling `{GetType().DeclaringType.Name}` will give a NullReferenceException. This happens in two places inside the URP Codebase. To fix this the calls are simply removed as they don't provide much value.

Author: ellioman

Packages/com.unity.render-pipelines.universal/Runtime/Passes/ColorGradingLutPass.cs

@@ -37,7 +37,7 @@ Material Load(Shader shader)
             {
                 if (shader == null)
                 {
-                    Debug.LogError($"Missing shader. {GetType().DeclaringType.Name} render pass will not execute. Check for missing reference in the renderer resources.");
+                    Debug.LogError($"Missing shader. ColorGradingLutPass render pass will not execute. Check for missing reference in the renderer resources.");
                     return null;
                 }
 

Packages/com.unity.render-pipelines.universal/Runtime/Passes/PostProcessPass.cs

@@ -1853,7 +1853,7 @@ Material Load(Shader shader)
             {
                 if (shader == null)
                 {
-                    Debug.LogErrorFormat($"Missing shader. {GetType().DeclaringType.Name} render pass will not execute. Check for missing reference in the renderer resources.");
+                    Debug.LogErrorFormat($"Missing shader. PostProcessing render passes will not execute. Check for missing reference in the renderer resources.");
                     return null;
                 }
                 else if (!shader.isSupported)