Added zoekt search indicator

Changelog: added

EE: true

ee/app/views/search/_form_elasticsearch.html.haml

 - if @search_service_presenter.advanced_search_enabled?
-  .form-text.text-muted{ **local_assigns.fetch(:attrs, {}) }
-    = advanced_search_status_marker(@project)
+  .gl-mt-2.gl-font-base.gl-mb-0.gl-text-gray-600.gl-align-self-center
+    - if @scope == 'blobs' && search_service.use_zoekt?
+      - link_url = help_page_path('user/search/exact_code_search')
+      - link_start = '<a href="%{url}" target="_blank" rel="noopener noreferrer">'.html_safe % { url: link_url }
+      - composited_link = s_('GlobalSearch|%{link_start}Exact code search (powered by Zoekt)%{link_end} is enabled') % { link_start: link_start, link_end: '</a>' }
+      = sanitize(composited_link).html_safe
+
+    - else
+      = advanced_search_status_marker(@project)

ee/spec/features/search/elastic/project_search_spec.rb

@@ -125,6 +125,22 @@
     end
   end
 
+  describe 'when zoekt is not enabled' do
+    before do
+      sign_in(user)
+      visit project_path(project)
+      ensure_elasticsearch_index!
+
+      submit_search('test')
+      select_search_scope('Code')
+    end
+
+    it 'does not display exact code search is enabled' do
+      expect(page).to have_selector('[data-testid="es-status-marker"][data-enabled="true"]')
+      expect(page).not_to have_text('Exact code search (powered by Zoekt) is enabled')
+    end
+  end
+
   describe 'renders error when zoekt search fails' do
     let(:query) { 'test' }
     let(:search_service) do

ee/spec/features/search/zoekt/search_spec.rb

@@ -70,5 +70,12 @@ def choose_project(project)
       select_search_scope('Code')
       expect(page).not_to have_selector('.file-content .blob-content')
     end
+
+    it 'displays that exact code search is enabled' do
+      submit_search('test')
+      select_search_scope('Code')
+      expect(page).to have_link('Exact code search (powered by Zoekt)',
+        href: help_page_path('user/search/exact_code_search'))
+    end
   end
 end

locale/gitlab.pot

@@ -21754,6 +21754,9 @@ msgstr ""
 msgid "GlobalSearch|%{count} default results provided. Use the up and down arrow keys to navigate search results list."
 msgstr ""
+msgid "GlobalSearch|%{link_start}Exact code search (powered by Zoekt)%{link_end} is enabled"
+msgstr ""
+
 msgid "GlobalSearch|Aggregations load error."
 msgstr ""