Add MySQL logger to persist logs from apisix

[mangoGoForward]

There are some plugin loggers like http-logger, kafka-logger which can receive log from apisix to persistence or analysis, but without MySQL logger.
Today, MySQL is the second ranking RDBMS solution in the world, according to DB Engines and it is a free-to-use, open-source database that facilitates effective management of databases by connecting them to the software. It is a stable, reliable and powerful solution with advanced features like the following Data Security, High Performance and so on, so there are many users or companies already use MySQL to persist data.
And lua-resty-mysql is a MySQL client driver for the ngx_lua nginx module, it support basic operation of CURD, maybe we can use it to persist request logs from apisix.
Please leave your comments below if there's anyone agrees with me.