Allow unlimited configuration of the AbsoluteParentContextPathStrategy

We have a use case where CAC configs are basically allowed on all levels (no matter how deeply nested). Currently the configuration property for levels is required though in https://github.com/wcm-io/wcm-io-caconfig/blob/e082419c35983bd5d82c3a8851737f31c2fcef7a/extensions/src/main/java/io/wcm/caconfig/extensions/contextpath/impl/AbsoluteParentContextPathStrategy.java#L68.
It would be nice if there would be support for a configuration which either has no limits at all or only specifies a lower limit (i.e. 1 or 2) but is unlimited below that level.