…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

Adds a new service `ClientLibrariesLookupService`.
This service provides a means by which to resolve ClientLibraries
by resource type.

The service will internally cache `resourceType` -> `ClientLibrary`
mappings such that future lookups for the same `resourceType` will
not require costly lookup or service-user sessions.

This service listens to the event topic: `com/adobe/granite/ui/librarymanager/INVALIDATED`.
When an event matching this topic occurs, then the cache items are cleared.

----
refs issue adobe#2446

Updates the `ClientLibrariesImpl` model by removing the clientlib lookup
logic and making use of the `ClientLibrariesLookupService` instead.

----
refs issue adobe#2446