Expose more features in the Hazelcast client

[philippgille]

As per #112, since hazelcast-go 1.3 there's now near-cache in the Go library, so we can expose that in the gokv implementation. We can also give the user more control over the logger.

Regarding the other points in the description, that's taken care of (the "TODO" comment and the GitHub Actions improvement), or will be taken care of in a future major change (context param).