Switch from zerolog to logr

[adutra]

The client package currently uses zerolog for logging. While this is a good library, people are now switching to https://github.com/go-logr/ which decouples the logging interface from the implementing library, à la SLF4J. Also, logr is widely used in the Kubernetes space.

We should then switch the client package to logr.

I am still on the fence about adding log calls to the other packages as they are meant for use in the hot path of a driver and any penalty incurred by log calls, even minimal, should be imo avoided.