Sync OpenAPI spec with upstream

[ionq-octo-sts]

Weekly sync of openapi.json with https://api.ionq.co/v0.4/api-docs and client regeneration. Merges automatically once all required checks pass.

Diff (sorted, pretty-printed JSON)

--- vendored
+++ upstream
@@ -5847,6 +5847,5 @@
     {
       "url": "https://api.ionq.co/v0.4"
     }
-  ],
-  "x-spec-sync-test": "deliberate drift; the first spec-sync run removes it"
+  ]
 }