Clarify support of the failover2 plugin for AWS RDS Multi-AZ DB Clusters

[lujop]

Describe the issue

Could we make explicit here if the failover2 plugin supports Multi AZ DB Clusters?

And also give some advice about recommended usage of failover vs failover2.
If not using Multi AZ DB Clusters which one is more recommended to use with the last version=?

Links

https://github.com/aws/aws-advanced-jdbc-wrapper/blob/main/docs/using-the-jdbc-driver/SupportForRDSMultiAzDBCluster.md
I would also make it explicit in the table here. Where it says it supports Aurora clusters I would put it doesn't support RDS Multi AZ if that's the case.
And also here https://github.com/aws/aws-advanced-jdbc-wrapper/blob/main/docs/using-the-jdbc-driver/using-plugins/UsingTheFailover2Plugin.md