chore: set response code details to oauth2 filter 401 local response

[zhaohuabing]

Commit Message: add error details to the OAuth2 filter 401 local response.
Additional Description:
Risk Level: low
Testing: unit test
Docs Changes: no
Release Notes: yes
Platform Specific Features:
[Optional Runtime guard:]
[Optional Fixes #37933]
[Optional Fixes commit #PR or SHA]
[Optional Deprecated:]
[Optional API Considerations:]

The following example shows the response_code_details added by this PR:

response_code_details":"Failed_to_get_access_token,_response_code:_400,_response_body:_{"error":"invalid_client"}

{"start_time":"2025-08-15T10:17:29.682Z","method":"GET","x-envoy-origin-path":"/myapp/oauth2/callback?code=22ef226d-ff19-417e-ab6b-cf4bce2824e0&state=eyJ1cmwiOiJodHRwczovL3d3dy5leGFtcGxlLmNvbS9teWFwcCIsImNzcmZfdG9rZW4iOiJiNmY2MWZkZWUwNjliZmI1LjdiRVdwY3JsWld3M1RIYjVMOGEyM3JyMndBRHBSRTIyZWEzeDU1RDJHWTg9In0","protocol":"HTTP/2","response_code":"401","response_flags":"-","response_code_details":"Failed_to_get_access_token,_response_code:_400,_response_body:_{"error":"invalid_client"}","connection_termination_details":"-","upstream_transport_failure_reason":"-","bytes_received":"0","bytes_sent":"18","duration":"452","x-envoy-upstream-service-time":"-","x-forwarded-for":"10.244.0.13","user-agent":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36","x-request-id":"c080a8b9-3fd2-4a9e-b187-87a749fb1f65",":authority":"www.example.com","upstream_host":"-","upstream_cluster":"httproute/default/myapp/rule/0","upstream_local_address":"-","downstream_local_address":"127.0.0.1:10443","downstream_remote_address":"127.0.0.1:42518","requested_server_name":"-","route_name":"httproute/default/myapp/rule/0/match/0/www_example_com"}

[wbpcode]

LGTM. Please add a change log. Thanks for the contribution.

[wbpcode]

/wait