help request: performance with blacklist plugins

### Description

When I use the ip-restriction plugin and configure 2000 IP lists at the same time, the TP99 of apisix will increase significantly. Is this because apisix will be blocked when loading too much etcd data? Is there any good way to solve this problem?

### Environment

- APISIX version (run `apisix version`): 3.5
- OpenResty / Nginx version (run `openresty -V` or `nginx -V`): 1.21.4.2

Start by reproducing the reported APISIX 3.5 setup with the ip-restriction plugin, 2,000 IP lists, and the stated OpenResty/Nginx versions. Measure TP99 while the configuration is loaded and inspect whether etcd data loading correlates with the latency increase; done means the cause is established and a supported remedy is identified.

Written by the indexing model from the issue text.