fix(openapi): update kafka-mgmt/v1 OpenAPI document (#279)

Co-authored-by: app-services-ci <app-services-ci@users.noreply.github.com>

Author: app-services-ci

.openapi/kas-fleet-manager.yaml

@@ -2,7 +2,7 @@ openapi: 3.0.0 # need this as first line to allow some IDEs to know this is an o
 # All endpoints defined here will be discoverable by all users. If there is a need to keep some endpoints "private", add them to the "managed-services-api-private.yaml" file
 info:
   title: Kafka Service Fleet Manager
-  version: 1.6.0
+  version: 1.7.0
   description: Kafka Service Fleet Manager is a Rest API to manage Kafka instances.
 servers:
   - url: https://api.openshift.com
@@ -983,6 +983,10 @@ components:
             created_at:
               format: date-time
               type: string
+            expires_at:
+              format: date-time
+              type: string
+              nullable: true
             updated_at:
               format: date-time
               type: string
@@ -1167,6 +1171,9 @@ components:
         capacity_consumed:
           description: 'Data plane cluster capacity consumed by this Kafka instance size.'
           type: integer
+        maturity_status:
+          description: 'Maturity level of the size. Can be stable or tech preview.'
+          type: string
     SupportedKafkaSizeBytesValueItem:
       type: object
       properties:
@@ -1716,7 +1723,8 @@ components:
               supported_az_modes: [
                 "single",
                 "multi",
-              ]
+              ],
+              maturity_status: 'stable'
             },
           ]
     CloudProviderExample: