Redirect deprecated issues routing to a new one

All unscoped issues routing like `group/project/issues/1` will be
redirected to `group/project/-/issues/1`
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

changelogs/unreleased/dz-redirect-unscoped-issue-routes.yml

+---
+title: Redirect issues routes under /-/ scope
+merge_request: 28655
+author:
+type: changed

config/routes/project.rb

@@ -408,12 +408,6 @@ constraints(::Constraints::ProjectUrlConstrainer.new) do
         end
       end
 
-      # Unscoped route. It will be replaced with redirect to /-/issues/
-      # Issue https://gitlab.com/gitlab-org/gitlab/issues/118849
-      scope as: 'deprecated' do
-        draw :issues
-      end
-
       resources :notes, only: [:create, :destroy, :update], concerns: :awardable, constraints: { id: /\d+/ } do # rubocop: disable Cop/PutProjectRoutesUnderScope
         member do
           delete :delete_attachment
@@ -481,7 +475,7 @@ constraints(::Constraints::ProjectUrlConstrainer.new) do
                                             :cycle_analytics, :mattermost, :variables, :triggers,
                                             :environments, :protected_environments, :error_tracking, :alert_management,
                                             :serverless, :clusters, :audit_events, :wikis, :merge_requests,
-                                            :vulnerability_feedback, :security, :dependencies)
+                                            :vulnerability_feedback, :security, :dependencies, :issues)
     end
 
     # rubocop: disable Cop/PutProjectRoutesUnderScope

ee/app/views/projects/issues/_discussion.html.haml

@@ -12,8 +12,7 @@
     = render_ce 'projects/issues/discussion'
   #designs-tab.tab-pane{ role: 'tabpanel', 'aria-labelledby': 'designs', data: { qa_selector: 'designs_tab_content'} }
     - if @project.design_management_enabled?
-      - deprecated_route = current_page?(project_deprecated_issue_path(@project, @issue)) || request.path.start_with?(designs_project_deprecated_issue_path(@project, @issue))
-      #js-design-management{ data: { project_path: @project.full_path, issue_iid: @issue.iid, issue_path: deprecated_route ? project_deprecated_issue_path(@project, @issue) : project_issue_path(@project, @issue) } }
+      #js-design-management{ data: { project_path: @project.full_path, issue_iid: @issue.iid, issue_path: project_issue_path(@project, @issue) } }
     - else
       .mt-4
         .row.empty-state

ee/spec/features/projects/issues/design_management/user_views_designs_from_deprecated_route_spec.rb

-# frozen_string_literal: true
-
-require 'spec_helper'
-
-describe 'User views issue designs from deprecated issue routes', :js do
-  include DesignManagementTestHelpers
-
-  let_it_be(:project) { create(:project_empty_repo, :public) }
-  let_it_be(:issue) { create(:issue, project: project) }
-  let_it_be(:design) { create(:design, :with_file, issue: issue) }
-
-  before do
-    enable_design_management
-  end
-
-  context 'navigates from the issue view on the deprecated route' do
-    before do
-      visit project_deprecated_issue_path(project, issue)
-      click_link 'Designs'
-      wait_for_requests
-    end
-
-    it 'fetches list of designs' do
-      expect(page).to have_selector('.js-design-list-item', count: 1)
-    end
-  end
-
-  context 'navigates directly to the design collection view on the deprecated route' do
-    before do
-      visit designs_project_deprecated_issue_path(project, issue)
-    end
-
-    it 'expands the sidebar' do
-      expect(page).to have_selector('.layout-page.right-sidebar-expanded')
-    end
-  end
-
-  context 'navigates directly to the individual design view on the deprecated route' do
-    before do
-      visit designs_project_deprecated_issue_path(project, issue, vueroute: design.filename)
-    end
-
-    it 'sees the design' do
-      expect(page).to have_selector('.js-design-detail')
-    end
-  end
-end

spec/features/dashboard/issues_spec.rb

@@ -73,7 +73,7 @@ RSpec.describe 'Dashboard Issues' do
 
       find('.new-project-item-link').click
 
-      expect(page).to have_current_path("#{project_path}/issues/new")
+      expect(page).to have_current_path("#{project_path}/-/issues/new")
 
       page.within('#content-body') do
         expect(page).to have_selector('.issue-form')

spec/requests/user_activity_spec.rb

@@ -24,8 +24,8 @@ describe 'Update of user activity' do
     '/dashboard/snippets',
     '/dashboard/groups',
     '/dashboard/todos',
-    '/group/project/issues',
-    '/group/project/issues/10',
+    '/group/project/-/issues',
+    '/group/project/-/issues/10',
     '/group/project/-/merge_requests',
     '/group/project/-/merge_requests/15'
   ]

spec/routing/project_routing_spec.rb

@@ -534,13 +534,17 @@ describe 'project routing' do
   #                            DELETE /:project_id/issues/:id(.:format)         issues#destroy
   describe Projects::IssuesController, 'routing' do
     it 'to #bulk_update' do
-      expect(post('/gitlab/gitlabhq/issues/bulk_update')).to route_to('projects/issues#bulk_update', namespace_id: 'gitlab', project_id: 'gitlabhq')
+      expect(post('/gitlab/gitlabhq/-/issues/bulk_update')).to route_to('projects/issues#bulk_update', namespace_id: 'gitlab', project_id: 'gitlabhq')
     end
 
     it_behaves_like 'RESTful project resources' do
       let(:controller) { 'issues' }
       let(:actions) { [:index, :create, :new, :edit, :show, :update] }
+      let(:controller_path) { '/-/issues' }
     end
+
+    it_behaves_like 'redirecting a legacy project path', "/gitlab/gitlabhq/issues", "/gitlab/gitlabhq/-/issues"
+    it_behaves_like 'redirecting a legacy project path', "/gitlab/gitlabhq/issues/1/edit", "/gitlab/gitlabhq/-/issues/1/edit"
   end
 
   # project_noteable_notes GET    /:project_id/noteable/:target_type/:target_id/notes notes#index