increase flexibility of ConsumerOps

[lacarvalho91]

Addition of a ConsumerRetryConfig object for providing the number of attempts and poll duration implicitly when calling consumeLazily.

Some refactoring to allow one or many topics to be provided to consumeLazily instead of separate methods.

Allow a transform function to be passed to consumeLazily to be run on all ConsumerRecords consumed - allows users to decode a ConsumerRecord however they want (e.g. I've had times where I need to return the timestamp from a ConsumerRecord). This also means we can cover the use-case of the consumeLazilyOnTopics method which was extracting the topic from the ConsumerRecord.

I have provided some implementations of this function in Codecs which I believe to be common usages.

[manub]

Thanks @lacarvalho91 - I shall take a look at this in the next days.