Mark PATCH /api/v2/incidents/incident_id/attachments endpoint as deprecated (#2766)

Co-authored-by: ci.datadog-api-spec <[email protected]>

Author: api-clients-generation-pipeline[bot]

.generator/schemas/v2/openapi.yaml

@@ -65621,6 +65621,7 @@ paths:
 
         If you have any feedback, contact [Datadog support](https://docs.datadoghq.com/help/).'
     patch:
+      deprecated: true
       description: The bulk update endpoint for creating, updating, and deleting attachments
         for a given incident.
       operationId: UpdateIncidentAttachments
@@ -65659,9 +65660,7 @@ paths:
         operator: OR
         permissions:
         - incident_write
-      x-unstable: '**Note**: This endpoint is in public beta.
-
-        If you have any feedback, contact [Datadog support](https://docs.datadoghq.com/help/).'
+      x-unstable: '**Note**: This endpoint is deprecated.'
   /api/v2/incidents/{incident_id}/impacts:
     get:
       description: Get all impacts for an incident.

lib/datadog_api_client/v2/api/incidents_api.rb

@@ -2299,12 +2299,15 @@ def update_incident_attachments(incident_id, body, opts = {})
     #
     # The bulk update endpoint for creating, updating, and deleting attachments for a given incident.
     #
+    # @deprecated This API is deprecated.
+    #
     # @param incident_id [String] The UUID of the incident.
     # @param body [IncidentAttachmentUpdateRequest] Incident Attachment Payload.
     # @param opts [Hash] the optional parameters
     # @option opts [Array<IncidentAttachmentRelatedObject>] :include Specifies which types of related objects are included in the response.
     # @return [Array<(IncidentAttachmentUpdateResponse, Integer, Hash)>] IncidentAttachmentUpdateResponse data, response status code and response headers
     def update_incident_attachments_with_http_info(incident_id, body, opts = {})
+      warn "[DEPRECATION] `UpdateIncidentAttachments` is deprecated."
       unstable_enabled = @api_client.config.unstable_operations["v2.update_incident_attachments".to_sym]
       if unstable_enabled
         @api_client.config.logger.warn format("Using unstable operation '%s'", "v2.update_incident_attachments")