Extract installed cluster application scope to concern

app/models/clusters/applications/helm.rb

@@ -8,8 +8,6 @@ module Clusters
       default_value_for :version, Gitlab::Kubernetes::Helm::HELM_VERSION
-      scope :installed, -> { where(status: ::Clusters::Applications::Helm.state_machines[:status].states[:installed].value) }
-
       def set_initial_status
         return unless not_installable?

app/models/clusters/applications/ingress.rb

@@ -11,8 +11,6 @@ module Clusters
       default_value_for :ingress_type, :nginx
       default_value_for :version, :nginx
-      scope :installed, -> { where(status: ::Clusters::Applications::Ingress.state_machines[:status].states[:installed].value) }
-
       enum ingress_type: {
         nginx: 1
       }

app/models/clusters/applications/prometheus.rb

@@ -13,8 +13,6 @@ module Clusters
       default_value_for :version, VERSION
-      scope :installed, -> { where(status: ::Clusters::Applications::Prometheus.state_machines[:status].states[:installed].value) }
-
       state_machine :status do
         after_transition any => [:installed] do |application|
           application.cluster.projects.each do |project|

app/models/clusters/applications/runner.rb

@@ -14,8 +14,6 @@ module Clusters
       default_value_for :version, VERSION
-      scope :installed, -> { where(status: ::Clusters::Applications::Runner.state_machines[:status].states[:installed].value) }
-
       def chart
         "#{name}/gitlab-runner"
       end

app/models/clusters/concerns/application_status.rb

@@ -4,6 +4,8 @@ module Clusters
       extend ActiveSupport::Concern
       included do
+        scope :installed, -> { where(status: self.state_machines[:status].states[:installed].value) }
+
         state_machine :status, initial: :not_installable do
           state :not_installable, value: -2
           state :errored, value: -1