[FE]: Add label & annotation to the auto-generated RemoteUserBinding to inform that it is managed by syngit

[damsien]

Roadmap 2025/01 Add label & annotation to the auto-generated RemoteUserBinding to inform that it is managed by Syngit.
As the developer of my team, I want to make the difference between RemoteUserBindings that have been automatically generated (with the syngit.io/associated-remote-userbinding: "true" annotation) and those who have not. I want to make the difference using a specific label.

What to do

1. On create

When creating the auto-generated RemoteUserBinding, add the labels managed-by: syngit.io & syngit.io/k8s-user: username. Also, add the annotation syngit.io/controlled-by: webhook/remoteuser-association.

syngit/internal/webhook/v1beta2/remoteuser_association_webhook.go

Lines 59 to 61 in 8442bb1

	// Create the RemoteUserBinding object
	rub.Name = name
	rub.Namespace = req.Namespace

The username variable already exists here:

syngit/internal/webhook/v1beta2/remoteuser_association_webhook.go

Line 28 in 8442bb1

username := req.DeepCopy().UserInfo.Username

2. On update

After setting the remoteRefs and before updating the RemoteUserBinding.

syngit/internal/webhook/v1beta2/remoteuser_association_webhook.go

Lines 93 to 95 in 8442bb1

	rub.Spec.RemoteRefs = remoteRefs
	updateErr := ruwh.Client.Update(ctx, rub)

Set the `syngit.io/controlled-by: webhook/remoteuser-association annotation again. Since the annotations fields is defined as a map, it will either add it to the map (is removed by the user) or replace the old value (which was the exact same).

Additional context

If you have any questions, please tag @damsien.