Maybe get_recommended_labels should take a struct of named arguments

[nightkr]

The current list of string arguments is confusing to follow (especially if you don't use rust-analyzer with parameter inlays), and is confusing and error-prone to update in operators when new arguments are added (often in the middle of the list).

This PR adds another parameter to the list: https://github.com/stackabletech/operator-rs/pull/492/files#diff-f3a8a77aa3434fb4aef8eb9c3d011832fc27301972b9975aa303832c3ed33675 Clippy also complains about the many parameters.

This is the function in its current state: https://github.com/stackabletech/operator-rs/blob/main/src/labels.rs#L22

Acceptance criteria:

• get_recommended_labels does not take so many arguments
• with_recommended_labels also

[nightkr]

I actually kind of think even just doing the easy "struct of &strs would be a huge improvement, but I believe @siegfriedweber had strong opinions here so I'll wait for him to return...