Right now there are different variants of lookupCollectionByNamespace, lookupCollectionByUUID, etc. This makes it difficult for callers who have a NamespaceStringOrUUID, who need to then stitch together the right CollectionCatalog functions in order to do a lookup (e.g. resolve the namespace string from the UUID if there is one, then lookup by namespace, or lookup by UUID directly, etc.) It would be good to have a lookupCollection function that directly takes NamespaceStringOrUUID and does the proper lookup.