Use gl_tabs_nav helper for integration overrides

app/helpers/integrations_helper.rb

@@ -125,15 +125,6 @@ module IntegrationsHelper
     !Gitlab.com?
   end
 
-  def integration_tabs(integration:)
-    [
-      { key: 'edit', text: _('Settings'), href: scoped_edit_integration_path(integration) },
-      (
-        { key: 'overrides', text: s_('Integrations|Projects using custom settings'), href: scoped_overrides_integration_path(integration) } if integration.instance_level?
-      )
-    ].compact
-  end
-
   def jira_issue_breadcrumb_link(issue_reference)
     link_to '', { class: 'gl-display-flex gl-align-items-center gl-white-space-nowrap' } do
       icon = image_tag image_path('illustrations/logos/jira.svg'), width: 15, height: 15, class: 'gl-mr-2'

app/views/shared/integrations/_tabs.html.haml

-- active_tab = local_assigns.fetch(:active_tab, 'edit')
-- active_classes = 'gl-tab-nav-item-active gl-tab-nav-item-active-indigo active'
-- tabs = integration_tabs(integration: integration)
-
-- if tabs.length <= 1
-  = yield
-- else
+- if integration.instance_level?
   .tabs.gl-tabs
     %div
-      %ul.nav.gl-tabs-nav{ role: 'tablist' }
-        - tabs.each do |tab|
-          %li.nav-item{ role: 'presentation' }
-            %a.nav-link.gl-tab-nav-item{ role: 'tab', class: (active_classes if tab[:key] == active_tab), href: tab[:href] }
-              = tab[:text]
+      = gl_tabs_nav({ class: 'gl-mb-5' }) do
+        = gl_tab_link_to _('Settings'), scoped_edit_integration_path(integration)
+        = gl_tab_link_to s_('Integrations|Projects using custom settings'), scoped_overrides_integration_path(integration)
 
-    .tab-content.gl-tab-content
-      .tab-pane.gl-pt-3.active{ role: 'tabpanel' }
-        = yield
+      = yield
+
+- else
+  = yield