Extends the class viewer module to support multiple custom class filters along with an optional associated view option flag.

Additional changes:
- Deprecates the previous method for specifying a singular custom class viewer filter and updates all existing occurrences of this pattern in engine code.
- Extends the property editor utilities interface to expose custom class filter(s) that can be applied to the class picker widget used for editing class property values.
- Adds an implementation of this interface to SDetailsView such that additional class filter(s) can now be configured to be applied to all underlying class property nodes.

#jira UE-108316
#rb Lauren.Barnes
#preflight 60c2102e8ae8960001110d50

#ROBOMERGE-OWNER: phillip.kavan
#ROBOMERGE-AUTHOR: phillip.kavan
#ROBOMERGE-SOURCE: CL 16623084 in //UE5/Main/...
#ROBOMERGE-BOT: STARSHIP (Main -> Release-Engine-Test) (v831-16623017)
#ROBOMERGE-CONFLICT from-shelf

[CL 16623246 by phillip kavan in ue5-release-engine-test branch]

Engine/Source/Editor/ClassViewer/Public/ClassViewerModule.h

@@ -57,13 +57,18 @@ enum class EClassViewerNameTypeToDisplay : uint8
  * Settings for the Class Viewer set by the programmer before spawning an instance of the widget.  This
  * is used to modify the class viewer's behavior in various ways, such as filtering in or out specific classes.
  */
+PRAGMA_DISABLE_DEPRECATION_WARNINGS
 class FClassViewerInitializationOptions
 {
 
 public:
-	/** The filter to use on classes in this instance. */
+	/** [Deprecated] The filter to use on classes in this instance. */
+	UE_DEPRECATED(5.0, "Please add to the ClassFilters array member instead.")
 	TSharedPtr<class IClassViewerFilter> ClassFilter;
 
+	/** The filter(s) to use on classes in this instance. */
+	TArray<TSharedRef<class IClassViewerFilter>> ClassFilters;
+
 	/** Mode to operate in */
 	EClassViewerMode::Type Mode;
 
@@ -146,6 +151,7 @@ public:
 	{
 	}
 };
+PRAGMA_ENABLE_DEPRECATION_WARNINGS
 
 /**
  * Class Viewer module