Implement `--reset-then-reuse-values` for Helm mode `--set` flags

[asauber]

There has been considerable confusion and apparent unexpected behavior when it comes to the use of the --reuse-values and --reset-values flags as they pertain to Helm in general. Because the Cilium CLI now embeds the logic for these flags from the upstream Helm implementation, that potential for confusion persists.

For more detail, please see the diagram in this Issue and the links to the related upstream issues. https://github.com/cilium/cilium-cli/issues/1624

In order to mitigate this confusion, and provide a better experience for users of the Cilium CLI, let's implement the --reset-then-reuse-values concept proposed in the upstream Issue discussions.