Update Maven Artifact Names and Descriptions

[jackwotherspoon]

We should update all maven artifacts to follow better naming conventions and to have better descriptions.

For instance our Postgres JDBC artifact is postgres-socket-factory which by the name itself does not mention Cloud SQL or Connector as all the other languages do.

Maven group: https://mvnrepository.com/search?q=com.google.cloud.sql

Nit: it is not abundantly clear that our j-8 artifact is for Java 8, 11, 17 etc.
https://mvnrepository.com/artifact/com.google.cloud.sql/mysql-socket-factory-connector-j-8

[jackwotherspoon]

Need to research how to not make this a breaking change 😄