Create library for common utils in kpt functions catalog

[phanimarupaka]

There are common methods which must be maintained as separate utility package in kpt functions catalog to maintain consistency across functions.

Ts example: https://googlecontainertools.github.io/kpt-functions-sdk/api/modules/types.html#kuberneteskey

[frankfarzan]

Common utilities should be provided by the SDK, instead of have a library maintain in the catalog repo.

[mikebz]

where are we on this issue? Close? Add to backlog? Let's make a decision.

[phanimarupaka]

Let's add to backlog.