v1.521.0

[eks/spacelift-worker-pool], [eks/spacelift-worker-pool-controller] Initial commit @Nuru (#1168)

## what

• [eks/spacelift-worker-pool] Initial commit
• [eks/spacelift-worker-pool-controller] Initial commit

why

• Support deployment of the Kubernetes Operator for Spacelift Worker Pools to an EKS cluster

[dns-delegated] Fix README.md to remove suggestion of deploying regionally @Nuru (#1167)

## what

• Remove suggestion from README that it can be deployed regionally
• Add details and references about using dns-delegated and dns-primary

why

• Old information was wrong and lacking in detail, causing confusion

fix: Runs-On README @milldr (#1166)

## what - Remove unclosed / unused summary

why

• This is breaking the cloudposse/docs release pipelines

references

• https://github.com/cloudposse/docs/actions/runs/11380845724