Create CompletableFuture-based AsyncCassandraOperations and AsyncCqlOperations variants #1294
Description
Our AsyncCassandraOperations returns ListenableFuture as synchronization handle. With Spring Framework 6, ListenableFuture is being deprecated and that creates an opportunity to revisit our asynchronous Cassandra arrangement. We could deprecate AsyncCassandraOperations and move it into a side-by-side package to retain usage of the deprecated API while we introduce a AsyncCassandraOperations replacement based on CompletableFuture.
This path would not require to come up with a clunky name such as CompletableCassandraOperations and it would still allow usage of the ListenableFuture-based API.