mysql.data.entityframeworkcore 已棄用

轉官網有方案：
https://dev.mysql.com/doc/connector-net/en/connector-net-entityframework-core.html

General Requirements for EF Core Support
Connector/NET 8.0

MySQL 8.0 Server (or MySQL 5.7)

Entity Framework Core packages:

MySql.EntityFrameworkCore 5.0.0+m8.0.2x and 3.1.10+m8.0.2x (Connector/NET 8.0.23 and later)

MySql.Data.EntityFrameworkCore 8.0.2x (Connector/NET 8.0.22 and earlier)