importing openapi file that contains extended field "x-apisix-..." doesnt work on apisix dashboard

[SatriyoJati]

Issue description

When I try to import openapi file containing extended field to apisix dashboard routes as like shown in this guide : https://apisix.apache.org/docs/dashboard/2.6/IMPORT_OPENAPI_USER_GUIDE/ , fileds that start with "x-apisix-..." , those are not imported.

Expected behavior

the "x-apisix.." fields should also imported to the dashboard : plugins, upstream, even the published status, but they are not imported.

How to Reproduce

1. prepare openapi docs file containing "x-apisix-..." field. like this :

openapi: 3.0.0
info:
 version: 1.0.0-oas3
 description: test desc
 license:
   name: Apache License 2.0
   url: 'http://www.apache.org/licenses/LICENSE-2.0'
 title: test title
paths:
 /hello:
   get:
     description: hello world.
     operationId: hello
     x-apisix-upstream:
       type: roundrobin
       nodes:
         - host: 172.16.238.20
           port: 1980
           weight: 1
     x-apisix-plugins:
       limit-count:  
         count: 2
         time_window: 60
         rejected_code: 503
         key: remote_addr
     x-apisix-status: 0
     responses:
       '200':
         description: list response
       default:
         description: unexpected error 

2. Open apisix dashboard, then go to Route Tab, open Advance and Import the openapi file.

Screenshots

Environment

• apisix version : 3.10
• OS : Windows 11
• etcd version : 3.5.11
• apisix-dashboard : 3.0.1

Additional context

No response

[SatriyoJati]

@bzp2010