feat: Improve user facing roles with dedicated roles

[remyj38]

What does this PR do?

Creating two dedicated cluster roles (view and admin) for user facing aggregated roles.

Motivation

User facing aggregated roles were supported since #664 but only aggregating Traefik cluster role to aggregated role.
In my opinion, this is not the right way to implement it as the Traefik cluster role only have view permission to traefik CRDs while admin aggregated role should "allow read/write access to most resources in a namespace".

More

• Yes, I updated the tests accordingly
• Yes, I updated the schema accordingly
• Yes, I ran make test and all the tests passed

[mloiseleur]

Hello @remyj38 ,

Thank you for your interest.
For the use case, we’re unsure about this need and the traction it will receive. We are going to leave the status as kind/proposal to give the community time to let us know if they would like this idea.

We will reevaluate as people respond.

For the implementation, it would require the maintainers to update rbac in a third file. It's already not ideal with the ClusterRole and the Role.
🤔 So why adding a duplicate rbac file instead of adding write access in the existing rbac when this feature is enabled ?