chore: Relocate maven artifacts and continue to support old names.

[ttosta-google]

We are renaming the Maven artifacts to establish a consistent and memorable naming convention for our libraries, making it easier for customers to remember and associate with our libraries.

Example:

<groupId>com.google.cloud</groupId>
<artifactId>cloud-sql-connector-jdbc-postgres</artifactId>

We will continue to publish artifacts with the old names that include a warning to change to the new artifact name. This way we won't leave any customers behind as part of this process.

Example:

[WARNING] The artifact com.google.cloud.sql:postgres-socket-factory:jar:1.17.0 has been relocated to com.google.cloud:cloud-sql-connector-jdbc-postgres:jar:1.17.0: Please use the new artifact.

Fixes #1728