Feature Request: filters for "build all"

[p3lim]

When running flux-local build ks you have an option to filter by label selector with --label-selector key=value.

I would like to see something similar when running flux-local build all, but instead of filtering in all resources I'd like to filter kustomizations. Suggested name for this arg would be --ks-label-selector.

This would allow building resources from specific kustomizations instead of all of them, which is very useful when you want to target/focus on something or for bootstrapping resources that need to exist early (like CNI).

While my request is about kustomization filtering, a similar option for filtering on helmreleases (i.e. --hr-label-selector) would be appreciated as well.

[allenporter]

Agree it makes sense to support label selectors here. My only hesitation is if we can use the existing flag for all resources rather than additional flags for each resource type.