bug: 在多线程环境下如何从filter传值到postFilter? 将filter中获取的数据和postFilter获取的数据串连起来

### Issue description
在多线程环境下，一个请求进入apisix网关，在路由上配置了ext-plugin-pre-req和ext-plugin-post-resp，在执行插件时，filter方法和postFilter执行顺序不是一一对应，导致数据错乱，如何将filter和postFilter通过一个唯一值串联起来呢

"plugins": {
"ext-plugin-post-resp": {
"allow_degradation": false,
"conf": [
{
"name": "AuthFilter",
"value": "authFilter"
}
],
"disable": false
},
"ext-plugin-pre-req": {
"allow_degradation": false,
"conf": [
{
"name": "AuthFilter",
"value": "authFilter"
}
],
"disable": false
}
},

can you help me?