Fix Kubernetes Agent Link on Project page

This commit fixes the link button.

Changelog: fixed

app/presenters/project_presenter.rb

@@ -364,7 +364,7 @@ class ProjectPresenter < Gitlab::View::Presenter::Delegated
       if clusters.empty?
         AnchorData.new(false,
                        statistic_icon + _('Add Kubernetes cluster'),
-                       new_project_cluster_path(project))
+                       project_clusters_path(project))
       else
         cluster_link = clusters.count == 1 ? project_cluster_path(project, clusters.first) : project_clusters_path(project)
 

spec/features/projects/show/user_sees_setup_shortcut_buttons_spec.rb

@@ -316,7 +316,7 @@ RSpec.describe 'Projects > Show > User sees setup shortcut buttons' do
           visit project_path(project)
 
           page.within('.project-buttons') do
-            expect(page).to have_link('Add Kubernetes cluster', href: new_project_cluster_path(project))
+            expect(page).to have_link('Add Kubernetes cluster', href: project_clusters_path(project))
           end
         end
 

spec/presenters/project_presenter_spec.rb

@@ -554,7 +554,7 @@ RSpec.describe ProjectPresenter do
           expect(presenter.kubernetes_cluster_anchor_data).to have_attributes(
             is_link: false,
             label: a_string_including('Add Kubernetes cluster'),
-            link: presenter.new_project_cluster_path(project)
+            link: presenter.project_clusters_path(project)
           )
         end
       end