Update project clusters API

- Expose fields managed and enabled where missing
- Update tests to use the new fields
- Update handbook to mention the fields

lib/api/entities/cluster.rb

@@ -3,7 +3,7 @@
 module API
   module Entities
     class Cluster < Grape::Entity
-      expose :id, :name, :created_at, :domain
+      expose :id, :name, :created_at, :domain, :enabled, :managed
       expose :provider_type, :platform_type, :environment_scope, :cluster_type, :namespace_per_environment
       expose :user, using: Entities::UserBasic
       expose :platform_kubernetes, using: Entities::Platform::Kubernetes

lib/api/project_clusters.rb

@@ -83,6 +83,8 @@ module API
         optional :environment_scope, type: String, desc: 'The associated environment to the cluster'
         optional :namespace_per_environment, default: true, type: Boolean, desc: 'Deploy each environment to a separate Kubernetes namespace'
         optional :management_project_id, type: Integer, desc: 'The ID of the management project'
+        optional :enabled, type: Boolean, default: true, desc: 'Determines if cluster is active or not, defaults to true'
+        optional :managed, type: Boolean, default: true, desc: 'Determines if GitLab will manage namespaces and service accounts for this cluster, defaults to true'
         optional :platform_kubernetes_attributes, type: Hash, desc: %q(Platform Kubernetes data) do
           optional :api_url, type: String, desc: 'URL to access the Kubernetes API'
           optional :token, type: String, desc: 'Token to authenticate against Kubernetes'

spec/requests/api/project_clusters_spec.rb

@@ -88,6 +88,8 @@ RSpec.describe API::ProjectClusters do
         expect(json_response['environment_scope']).to eq('*')
         expect(json_response['cluster_type']).to eq('project_type')
         expect(json_response['domain']).to eq('example.com')
+        expect(json_response['enabled']).to eq('true')
+        expect(json_response['managed']).to eq('true')
       end
 
       it 'returns project information' do