HDRP Wizard FixAll button hide when no fix available

Fix issue [UUM-84977](https://jira.unity3d.com/browse/UUM-84977) where FixAll button is visible even if it cannot fix anything due to issues found requiring manual resolve by user.

Packages/com.unity.render-pipelines.high-definition/Editor/Wizard/HDWizard.Configuration.cs

@@ -249,11 +249,11 @@ Entry[] entries
         }
 
         // Utility that grab all check within the scope or in sub scope included and check if everything is correct
-        bool IsAllEntryCorrectInScope(InclusiveMode scope)
+        bool IsAFixAvailableInScope(InclusiveMode scope)
         {
             foreach (var e in entries)
             {
-                if (!scope.Contains(e.inclusiveScope) || e.check == null)
+                if (!scope.Contains(e.inclusiveScope) || e.check == null || e.fix == null)
                     continue;
                 if (!e.check())
                     return false;

Packages/com.unity.render-pipelines.high-definition/Editor/Wizard/HDWizard.UIElement.cs

@@ -421,7 +421,7 @@ public InclusiveModeElement(InclusiveMode mode, string label, string tooltip, HD
 
                 m_FixAllButton = new FixAllButton(
                     Style.resolveAll,
-                    () => m_Wizard.IsAllEntryCorrectInScope(m_Mode),
+                    () => m_Wizard.IsAFixAvailableInScope(m_Mode),
                     () => m_Wizard.FixAllEntryInScope(m_Mode));
 
                 bool userOnWindows = RuntimeInformation.IsOSPlatform(System.Runtime.InteropServices.OSPlatform.Windows);