Add flag to skip rewriting values.yaml

[LP0101]

Added a flag to skip rewriting the values.yaml

Usage:

--skip-values: Prevent charts-syncer from rewriting the image paths in values.yaml

Solves #104

[jotadrilo]

Hello @LP0101, thanks for your contribution.

However, we would like to handle this issue using #153. The main reason is that, while this feature enables skipping the values rewrite via CLI, #153 enables skipping the container registry target definition. This is scoped and enough to fix #104 while it gives room to modify any, possibly, setting in the values YAML file unrelated to the container registry.

Sounds good?