[WIP] Adding a grep-able logger interface

[Skarlso]

What type of PR is this?

/kind feature

What this PR does / why we need it:

Fixes #3101

This is a WIP PR which suggests a clean Logging interface. Right now, it's using klog in the background but a discussion in #3152 and kubernetes-sigs/cluster-api#5571 (comment) suggests the usage of a JSON logger such as zap or zerolog or something else.

The API is pretty simple. Provides a couple of functions such as Info, Warning, Debug, Trace, Fatal, etc. It basically works right now by adding "level=INFO" as a Key, value pair to the log output.

Special notes for your reviewer:

Checklist:

• squashed commits
• includes documentation
• adds unit tests
• adds or updates e2e tests

Release note:

Add grep-able log message to the controllers

[k8s-ci-robot]

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[k8s-ci-robot]

Hi @Skarlso. Thanks for your PR.

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[k8s-ci-robot]

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[k8s-ci-robot]

@Skarlso: PR needs rebase.

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