Add suggest_pipeline_enabled param to update app settings API endpoint

doc/api/settings.md

@@ -407,6 +407,7 @@ listed in the descriptions of the relevant settings.
 | `spam_check_endpoint_enabled`            | boolean          | no                                   | Enables Spam Check via external API endpoint. Default is `false`. |
 | `spam_check_endpoint_url`                | string           | no                                   | URL of the external Spam Check service endpoint. |
 | `spam_check_api_key`                      | string           | no                                   | The API key used by GitLab for accessing the Spam Check service endpoint. |
+| `suggest_pipeline_enabled`               | boolean          | no                                   | Enable pipeline suggestion banner. |
 | `terminal_max_session_time`              | integer          | no                                   | Maximum time for web terminal websocket connection (in seconds). Set to `0` for unlimited time. |
 | `terms`                                  | text             | required by: `enforce_terms`         | (**Required by:** `enforce_terms`) Markdown content for the ToS. |
 | `throttle_authenticated_api_enabled`     | boolean          | no                                   | (**If enabled, requires:** `throttle_authenticated_api_period_in_seconds` and `throttle_authenticated_api_requests_per_period`) Enable authenticated API request rate limit. Helps reduce request volume (for example, from crawlers or abusive bots). |

lib/api/settings.rb

@@ -177,6 +177,7 @@ module API
       optional :whats_new_variant, type: String, values: ApplicationSetting.whats_new_variants.keys, desc: "What's new variant, possible values: `all_tiers`, `current_tier`, and `disabled`."
       optional :floc_enabled, type: Grape::API::Boolean, desc: 'Enable FloC (Federated Learning of Cohorts)'
       optional :user_deactivation_emails_enabled, type: Boolean, desc: 'Send emails to users upon account deactivation'
+      optional :suggest_pipeline_enabled, type: Boolean, desc: 'Enable pipeline suggestion banner'
 
       ApplicationSetting::SUPPORTED_KEY_TYPES.each do |type|
         optional :"#{type}_key_restriction",

spec/requests/api/settings_spec.rb

@@ -48,6 +48,7 @@ RSpec.describe API::Settings, 'Settings', :do_not_mock_admin_mode_setting do
       expect(json_response['admin_mode']).to be(false)
       expect(json_response['whats_new_variant']).to eq('all_tiers')
       expect(json_response['user_deactivation_emails_enabled']).to be(true)
+      expect(json_response['suggest_pipeline_enabled']).to be(true)
     end
   end
 
@@ -135,7 +136,8 @@ RSpec.describe API::Settings, 'Settings', :do_not_mock_admin_mode_setting do
             wiki_page_max_content_bytes: 12345,
             personal_access_token_prefix: "GL-",
             user_deactivation_emails_enabled: false,
-            admin_mode: true
+            admin_mode: true,
+            suggest_pipeline_enabled: false
           }
 
         expect(response).to have_gitlab_http_status(:ok)
@@ -187,6 +189,7 @@ RSpec.describe API::Settings, 'Settings', :do_not_mock_admin_mode_setting do
         expect(json_response['personal_access_token_prefix']).to eq("GL-")
         expect(json_response['admin_mode']).to be(true)
         expect(json_response['user_deactivation_emails_enabled']).to be(false)
+        expect(json_response['suggest_pipeline_enabled']).to be(false)
       end
     end