Support for klog as logging middleware

[alok87]

We use github.com/kubernetes/klog extensively in many go projects as the logging library.

Possible to get it in here as a middleware. Would love to add support if it is possible.

[johanbrandhorst]

Hi, thanks for your issue! We're happy to accept this contribution, but consider making it against the v2 branch as we plan to put new work into that branch exclusively.

[alok87]

Hey! Great I can add the support. Can you give some reference PR for it and any help on how to go about it will help me do this quick.

[johanbrandhorst]

You could check out the zap implementation for inspiration: https://github.com/grpc-ecosystem/go-grpc-middleware/blob/v2/providers/zap/logger.go.