Add support for MariaDB database driver

[Fezlight]

Do you have any information about support for MariaDB database through it's dedicated driver "org.mariadb.jdbc:mariadb-java-client" ?

Caused by: java.lang.IllegalArgumentException: Unsupported database type: MariaDB
   at org.springframework.modulith.events.jdbc.DatabaseType.lambda$from$1(DatabaseType.java:54)
   at java.base/java.util.Optional.orElseThrow(Optional.java:403)
   at org.springframework.modulith.events.jdbc.DatabaseType.from(DatabaseType.java:54)
   at org.springframework.modulith.events.jdbc.JdbcEventPublicationAutoConfiguration.databaseType(JdbcEventPublicationAutoConfiguration.java:45)
   at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
   at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   at java.base/java.lang.reflect.Method.invoke(Method.java:568)
   at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:146)
   ... 85 common frames omitted

As an alternative, because MariaDB works like MySQL we can switch to the MySQL driver if version under 11.X but we loose some specific feature added by driver itself.

[odrotbohm]

We can, of course, add support for that. If you'd like to help, do you think could duplicate the MYSQL enum value in DatabaseType and create copies of the MySQL-related tests and schema files? Given the similar nature of Maria with MySQL, I don't think any further adjustments should be necessary.

[Fezlight]

Yes, I think duplicating the value of the enum is enough, as both work in the same way. I can do a PR when i got some time.

[Fezlight]

I finally opened the pull request :) #839

[odrotbohm]

You apparently found time pretty quickly! 🙃 Merged, thanks!