help request: rate limit all requests per route with `limit-conn` and `limit-req`

[aixi]

Description

I have multiple user using the same route,I want rate limit apply to all request to the same route, not split by key (consumer remote_addr)

Environment

• APISIX version (run apisix version):
• 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):

[kayx23]

Try setting key_type to constant and using a constant value in key.

[aixi]

Try setting key_type to constant and using a constant value in key.

I think key_type == constant only works in limit-count，not limit-conn，limit-req, but limit-count is fix window and limit-req is leaky bucket, so to me it's not ideal