Description

failed jobs:
https://github.com/apache/apisix/actions/runs/15817495697/job/44579024603
https://github.com/apache/apisix/actions/runs/15821515715/job/44591668640

the result of

ngx.encode_args({ service_id = "1", upstream_id = "1" })

is service_id=1&upstream_id=1 or upstream_id=1&service_id=1, the order of service_id and upstream_id is random.
so the final uri is /apisix/admin/routes?filter=service_id=1&upstream_id=1 or /apisix/admin/routes?filter=upstream_id=1&service_id=1, because second one meaning only filter by upstream_id=1, and the result is same as service_id=1 && upstream_id=1, so this test case working sometimes.

Which issue(s) this PR fixes:

Fixes #

Checklist

• I have explained the need for this PR and the problem it solves
• I have explained the changes or the new features added to this PR
• I have added tests corresponding to this change
• I have updated the documentation to reflect this change
• I have verified that this change is backward compatible (If not, please discuss on the APISIX mailing list first)