Automatically assign Elastic IP addresses when referencing AWS well known annotations

[prometherion]

We documented, although with a blog post, how to deploy Tenant Control Planes on AWS.

Right now, we need to know in advance the Elastic IPs and manually insert the network address (tcp.spec.networkProfile.address), as well as the additional certificate SANs when having multiple allocated IPs.

Since we know in advance the required annotations piloting the AWS LB object, such as service.beta.kubernetes.io/aws-load-balancer-eip-allocations, Kamaji could extract this information directly by querying AWS using the Go client.

A minimum AWS Role must be designed as well as assigned, and it's expected to be R/O since the LB lifecycle is managed externally by the AWS Load Balancer Controller.