Allow selection of existing GKE clusters in Cluster page
We already support connecting to GKE to create a new cluster. Why not allowing to select one of the existing clusters instead?
In the CI/CD > Cluster page, allow selection of existing GKE clusters fetched realtime from GCP.
Links / references
Kubernetes/GKE integration: #35956
What is it? Why should someone use this feature? What is the underlying (business) problem? How do you use this feature?
Who is this for? Provide one or more use cases.
Make sure these are completed before closing the issue, with a link to the relevant commit.