Add deprecated API throttling settings to admin area

We need to be able to change these settings

app/views/admin/application_settings/network.html.haml

@@ -49,6 +49,18 @@
     .settings-content
       = render partial: 'network_rate_limits', locals: { anchor: 'js-files-limits-settings', setting_fragment: 'files_api' }
 
+%section.settings.as-deprecated-limits.no-animate#js-deprecated-limits-settings{ class: ('expanded' if expanded_by_default?) }
+  .settings-header
+    %h4
+      = _('Deprecated API rate limits')
+    %button.btn.gl-button.btn-default.js-settings-toggle{ type: 'button' }
+      = expanded_by_default? ? _('Collapse') : _('Expand')
+    %p
+      = _('Configure specific limits for deprecated API requests that supersede the general user and IP rate limits.')
+      = link_to _('Which API requests are affected?'), help_page_path('user/admin_area/settings/deprecated_api_rate_limits.md'), target: '_blank', rel: 'noopener noreferrer'
+  .settings-content
+    = render partial: 'network_rate_limits', locals: { anchor: 'js-deprecated-limits-settings', setting_fragment: 'deprecated_api' }
+
 %section.settings.as-git-lfs-limits.no-animate#js-git-lfs-limits-settings{ class: ('expanded' if expanded_by_default?), data: { qa_selector: 'git_lfs_limits_content' } }
   .settings-header
     %h4

locale/gitlab.pot

@@ -8602,6 +8602,9 @@ msgstr ""
 msgid "Configure specific limits for Git LFS requests that supersede the general user and IP rate limits."
 msgstr ""
 
+msgid "Configure specific limits for deprecated API requests that supersede the general user and IP rate limits."
+msgstr ""
+
 msgid "Configure the %{link} integration."
 msgstr ""
 
@@ -11412,6 +11415,9 @@ msgstr ""
 msgid "Deployment|success"
 msgstr ""
 
+msgid "Deprecated API rate limits"
+msgstr ""
+
 msgid "Deprioritize label"
 msgstr ""
 
@@ -38129,6 +38135,9 @@ msgstr ""
 msgid "When:"
 msgstr ""
 
+msgid "Which API requests are affected?"
+msgstr ""
+
 msgid "While it's rare to have no vulnerabilities, it can happen. In any event, we ask that you please double check your settings to make sure you've set up your dashboard correctly."
 msgstr ""
 

spec/features/admin/admin_settings_spec.rb

@@ -644,6 +644,13 @@ RSpec.describe 'Admin updates settings' do
 
         include_examples 'regular throttle rate limit settings'
       end
+
+      context 'Deprecated API rate limits' do
+        let(:selector) { 'as-deprecated-limits' }
+        let(:fragment) { :deprecated_api }
+
+        include_examples 'regular throttle rate limit settings'
+      end
     end
 
     context 'Preferences page' do