Support running Halo with MySQL and MariaDB database

[JohnNiang]

What type of PR is this?

/kind feature
/area core
/milestone 2.0

What this PR does / why we need it:

Add MySQL script to support running Halo with MySQL database due to jasync-sql/jasync-sql#311 has been resolved.

Which issue(s) this PR fixes:

Fixes #2464

Special notes for reviewers

Steps to test:

1. Start up MySQL. e.g.:

   version: '3.1'
   
   services:
   
     db:
       image: mysql
       # NOTE: use of "mysql_native_password" is not recommended: https://dev.mysql.com/doc/refman/8.0/en/upgrading-from-previous-series.html#upgrade-caching-sha2-password
       # (this is just an example, not intended to be a production configuration)
       command: --default-authentication-plugin=mysql_native_password
       restart: always
       environment:
         MYSQL_ROOT_PASSWORD: openmysql
       ports:
         - 3306:3306
   
     adminer:
       image: adminer
       restart: always
       ports:
         - 8080:8080

   docker-compose -f mysql.yaml up

2. Start Halo with mysql profile. e.g.:

   ./gradlew bootRun --args="--spring.profiles.active=mysql"

3. Validate the functionality of Halo

Does this PR introduce a user-facing change?

支持 MySQL 和 Maria DB 作为 Halo 的数据库

[ruibaby]

/lgtm

我这边使用 MariaDB 最新版本测试了下，没有遇到什么问题。

[JohnNiang]

/retitle Support running Halo with MySQL and MariaDB database

[guqing]

/approve

[guqing]

mysql 测试通过

[f2c-ci-robot]

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