Use helper for feature check in cluster partials

app/helpers/clusters_helper.rb

+module ClustersHelper
+  def has_multiple_clusters?(project)
+    project.feature_available?(:multiple_clusters)
+  end
+end

app/views/projects/clusters/gcp/_form.html.haml

@@ -10,10 +10,7 @@
 
   .form-group
     = field.label :environment_scope, s_('ClusterIntegration|Environment scope')
-    - if @project.feature_available?(:multiple_clusters)
-      = field.text_field :environment_scope, class: 'form-control', placeholder: s_('ClusterIntegration|Environment scope')
-    - else
-      = field.text_field :environment_scope, class: 'form-control', readonly: true, placeholder: s_('ClusterIntegration|Environment scope')
+    = field.text_field :environment_scope, class: 'form-control', readonly: has_multiple_clusters?(@project), placeholder: s_('ClusterIntegration|Environment scope')
 
   = field.fields_for :provider_gcp, @cluster.provider_gcp do |provider_gcp_field|
     .form-group

app/views/projects/clusters/gcp/_show.html.haml

@@ -11,10 +11,7 @@
 
   .form-group
     = field.label :environment_scope, s_('ClusterIntegration|Environment scope')
-    - if @project.feature_available?(:multiple_clusters)
-      = field.text_field :environment_scope, class: 'form-control js-select-on-focus', placeholder: s_('ClusterIntegration|Environment scope')
-    - else
-      = field.text_field :environment_scope, class: 'form-control js-select-on-focus', readonly: true, placeholder: s_('ClusterIntegration|Environment scope')
+    = field.text_field :environment_scope, class: 'form-control js-select-on-focus', readonly: has_multiple_clusters?(@project), placeholder: s_('ClusterIntegration|Environment scope')
 
   = field.fields_for :platform_kubernetes, @cluster.platform_kubernetes do |platform_kubernetes_field|
     .form-group

app/views/projects/clusters/user/_form.html.haml

@@ -6,10 +6,7 @@
 
   .form-group
     = field.label :environment_scope, s_('ClusterIntegration|Environment scope')
-    - if @project.feature_available?(:multiple_clusters)
-      = field.text_field :environment_scope, class: 'form-control', placeholder: s_('ClusterIntegration|Environment scope')
-    - else
-      = field.text_field :environment_scope, class: 'form-control', readonly: true, placeholder: s_('ClusterIntegration|Environment scope')
+    = field.text_field :environment_scope, class: 'form-control', readonly: has_multiple_clusters?(@project), placeholder: s_('ClusterIntegration|Environment scope')
 
   = field.fields_for :platform_kubernetes, @cluster.platform_kubernetes do |platform_kubernetes_field|
     .form-group

app/views/projects/clusters/user/_show.html.haml

@@ -6,10 +6,7 @@
 
   .form-group
     = field.label :environment_scope, s_('ClusterIntegration|Environment scope')
-    - if @project.feature_available?(:multiple_clusters)
-      = field.text_field :environment_scope, class: 'form-control js-select-on-focus', placeholder: s_('ClusterIntegration|Environment scope')
-    - else
-      = field.text_field :environment_scope, class: 'form-control js-select-on-focus', readonly: true, placeholder: s_('ClusterIntegration|Environment scope')
+    = field.text_field :environment_scope, class: 'form-control js-select-on-focus', readonly: has_multiple_clusters?(@project), placeholder: s_('ClusterIntegration|Environment scope')
 
   = field.fields_for :platform_kubernetes, @cluster.platform_kubernetes do |platform_kubernetes_field|
     .form-group