Migrate activity tabs form bootstrap to GlTabs

This change updates the classes used to render filter tabs for project
activity.

Tabs are now compliant with Pajamas and don't use Bootstrap classes.

app/views/dashboard/_activity_head.html.haml

@@ -2,13 +2,7 @@
   %h1.page-title= _('Activity')
 
 .top-area
-  %ul.nav-links.nav.nav-tabs
-    %li{ class: active_when(params[:filter].nil?) }>
-      = link_to activity_dashboard_path, class: 'shortcuts-activity', data: {placement: 'right'} do
-        = _('Your projects')
-    %li{ class: active_when(params[:filter] == 'starred') }>
-      = link_to activity_dashboard_path(filter: 'starred'), data: {placement: 'right'} do
-        = _('Starred projects')
-    %li{ class: active_when(params[:filter] == 'followed') }>
-      = link_to activity_dashboard_path(filter: 'followed'), data: {placement: 'right'} do
-        = _('Followed users')
+  = gl_tabs_nav({ class: 'gl-border-b-0', data: { testid: 'dashboard-activity-tabs' } }) do
+    = gl_tab_link_to _("Your projects"), activity_dashboard_path, { item_active: params[:filter].nil? }
+    = gl_tab_link_to _("Starred projects"), activity_dashboard_path(filter: 'starred')
+    = gl_tab_link_to _("Followed users"), activity_dashboard_path(filter: 'followed')

spec/features/dashboard/activity_spec.rb

@@ -13,19 +13,19 @@ RSpec.describe 'Dashboard > Activity' do
     it 'shows Your Projects' do
       visit activity_dashboard_path
 
-      expect(find('.top-area .nav-tabs li.active')).to have_content('Your projects')
+      expect(find('[data-testid="dashboard-activity-tabs"] a.active')).to have_content('Your projects')
     end
 
     it 'shows Starred Projects' do
       visit activity_dashboard_path(filter: 'starred')
 
-      expect(find('.top-area .nav-tabs li.active')).to have_content('Starred projects')
+      expect(find('[data-testid="dashboard-activity-tabs"] a.active')).to have_content('Starred projects')
     end
 
     it 'shows Followed Projects' do
       visit activity_dashboard_path(filter: 'followed')
 
-      expect(find('.top-area .nav-tabs li.active')).to have_content('Followed users')
+      expect(find('[data-testid="dashboard-activity-tabs"] a.active')).to have_content('Followed users')
     end
   end