Migrate to Maven Central Publisher Portal

[bryceitoc9]

Problem

Sonatype is deprecating the OSSRH and the Nexus Repository Manager v2 at the end of the month

Solution

Migrate to Sonatype's Central Publisher Portal by way of the Portal OSSRH Staging API

WORDS OF WARNING

• This is a one-way door. We can't go back once credentials are generated
• We will need to generate new credentials and add them to internal Secrets (merge this PR in conjunction with that one)
• We need to see if we can do a metric definition deployment to ensure nothing breaks and that there are no additional steps required (specifically noting the approval/publish workflow in the Central Publisher Portal intro)

License

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.