Share `Stdout`/`Stderr` Output Utils Between `lakefs` and `lakectl`

[eladlachmi]

lakectl has nice template-based utility functions for outputting to Stdout/Stderr, but those can't be imported into lakefs. While working on this PR, I added some basic utility functions tolakefs for this purpose. However, sharing a set of utility functions between lakefs and lakectl would be preferable.

The output util functions from lakectl should be extracted to a separate package and consumed by both lakectl and lakefs