Add support for GETEX and GETDEL through imperative and reactive …ValueOperations

[mp911de]

Add support in BoundValueOperations, imperative and reactive …ValueOperations and on the connection level.

On the operations level we could have:

V getAndExpire(K key, long timeout, TimeUnit unit);

V getAndExpire(K key, Duration timeout);

V getAndPersist(K key);

V getAndDelete(K key);

See https://redis.io/commands/getex and https://redis.io/commands/getdel