mgr/dashboard: update openapi specification for /api/cluster/user/export

This commit updates the openapi specification for /api/cluster/user/export endpoint to reflect the current api behaviour.

Fixes: https://tracker.ceph.com/issues/70043
Signed-off-by: Laimis Juzeliunas <[email protected]>

Author: laimis9133

src/pybind/mgr/dashboard/controllers/ceph_users.py

@@ -217,7 +217,10 @@ def model(user_entity: str):
     extra_endpoints=[
         ('export', CRUDCollectionMethod(
             func=RESTController.Collection('POST', 'export')(CephUserEndpoints.export),
-            doc=EndpointDoc("Export Ceph Users")
+            doc=EndpointDoc("Export Ceph Users",
+                            parameters={
+                                "entities": Param([str], "List of entities to export")
+                            })
         ))
     ],
     selection_type=SelectionType.MULTI,

src/pybind/mgr/dashboard/openapi.yaml

@@ -3883,7 +3883,10 @@ paths:
             schema:
               properties:
                 entities:
-                  type: string
+                  description: List of entities to export
+                  items:
+                    type: string
+                  type: array
               required:
               - entities
               type: object