Change Utils#getSuperTypes to use `ResourceResolver#getParentResour…

…ceType(String);

Updates `Utils#getSuperType` to use `resourceResolver.getParentResourceType(superType)`
instead of `resourceResolver.getResource(superType).getResourceSuperType`.

This change is made because any `ResourceResolver` can always resolve the resource
super type hierarchy via `ResourceResolver#getParentResourceType(String)`, even if
`ResrouceResolver#getResource(String)` would be unable to resolve the super type
resource due to permissions.

After this change, the only requirement for the `ResourceResolver` passed to
`Utils#getSuperTypes()` is that it be an active `ResourceResolver` - it does
not need to be a special `ResourceResolver` with any elevated permissions.

----
refs issue adobe#2446

bundles/core/src/main/java/com/adobe/cq/wcm/core/components/internal/Utils.java

@@ -173,8 +173,7 @@ public static Set<String> getSuperTypes(@NotNull final String resourceType, @Not
         Set<String> superTypes = new HashSet<>();
         String superType = resourceType;
         while (superType != null) {
-            superType = Optional.ofNullable(resourceResolver.getResource(superType))
-                .map(Resource::getResourceSuperType)
+            superType = Optional.ofNullable(resourceResolver.getParentResourceType(superType))
                 .filter(StringUtils::isNotEmpty)
                 .orElse(null);
             if (superType != null) {