Add enum user callout for pipeline banner

To enable us to show a new pipeline banner
for needs view, we need a new enmu value
for the user callouts.

app/models/user_callout.rb

@@ -29,7 +29,8 @@ class UserCallout < ApplicationRecord
     registration_enabled_callout: 25,
     new_user_signups_cap_reached: 26,          # EE-only
     unfinished_tag_cleanup_callout: 27,
-    eoa_bronze_plan_banner: 28                 # EE-only
+    eoa_bronze_plan_banner: 28,                # EE-only
+    pipeline_needs_banner: 29
   }
 
   validates :user, presence: true

doc/api/graphql/reference/index.md

@@ -8596,6 +8596,7 @@ Name of the feature that the callout is for.
 | `GOLD_TRIAL_BILLINGS` | Callout feature name for gold_trial_billings. |
 | `NEW_USER_SIGNUPS_CAP_REACHED` | Callout feature name for new_user_signups_cap_reached. |
 | `PERSONAL_ACCESS_TOKEN_EXPIRY` | Callout feature name for personal_access_token_expiry. |
+| `PIPELINE_NEEDS_BANNER` | Callout feature name for pipeline_needs_banner. |
 | `REGISTRATION_ENABLED_CALLOUT` | Callout feature name for registration_enabled_callout. |
 | `SERVICE_TEMPLATES_DEPRECATED_CALLOUT` | Callout feature name for service_templates_deprecated_callout. |
 | `SUGGEST_PIPELINE` | Callout feature name for suggest_pipeline. |