bug: Reposne_write plugin will delete the server-side cookies

[JohnQI8888]

Current Behavior

Reposne_write plugin will delete the server-side cookies

Expected Behavior

No response

Error Logs

No response

Steps to Reproduce

1. Run apisix
2. setup a route looks like this:
   "value": {
   "host": "aaa.xxx.com",
   "plugins": {
   "prometheus": {},
   "response-rewrite": {
   "headers": {
   "Set-Cookie": "tagged=23333; Expires=Wed, 11 Sep 2030 08:00:00 GMT"
   }
   }
   },
   "uris": [
   "/*"
   ],
   "filter_func": "function(vars)\n return true\nend",
   "upstream_id": "127",
   "name": "-master_r_2022-08-17_3-DEFAULT",
   "priority": 0,
   "id": "345"
   },
3. the backend server setup another cookie
4. check the response, you will find the server-side cookies were deleted.

Environment

• APISIX version (run apisix version):1.5
• Operating system (run uname -a):
• OpenResty / Nginx version (run openresty -V or nginx -V):
• etcd version, if relevant (run curl http://127.0.0.1:9090/v1/server_info):
• APISIX Dashboard version, if relevant:
• Plugin runner version, for issues related to plugin runners:
• LuaRocks version, for installation issues (run luarocks --version):

[spacewander]

Known issue. We will fix it via https://lists.apache.org/thread/bxl0sn1qb5fchvnynz7b8sst9r07cyqm.