Fix usage of instance variable in cluster forms

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

@@ -9,7 +9,7 @@
     = field.text_field :name, class: 'form-control', placeholder: s_('ClusterIntegration|Cluster name')
   .form-group
     = field.label :environment_scope, s_('ClusterIntegration|Environment scope')
-    - if project.feature_available?(:multiple_clusters)
+    - 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', disabled: true, placeholder: s_('ClusterIntegration|Environment scope')

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

@@ -5,7 +5,7 @@
     = field.text_field :name, class: 'form-control', placeholder: s_('ClusterIntegration|Cluster name')
   .form-group
     = field.label :environment_scope, s_('ClusterIntegration|Environment scope')
-    - if project.feature_available?(:multiple_clusters)
+    - 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', disabled: true, placeholder: s_('ClusterIntegration|Environment scope')