Kafka Connect: Include third party licenses and notices in distribution

[bryanck]

This PR includes third party licenses and notices in the Kafka Connect sink distribution archives.

The third party licenses and notices were generated using the Gradle License Report plugin, along with a custom report renderer. This is the same plugin used to generate the license and notice files for the AWS, GCP, and Azure bundles. The plugin scans jar and pom file dependencies for license and notice information.

(We might want to consider adding this plugin to the build so we can regenerate the license and notice files more easily.)

[bryanck]

@rdblue @danielcweeks in case you want to take a look, Let me know if you want a different format, I can easily regenerate the files

[RussellSpitzer]

Reminder to @danielcweeks + @bryanck to finalize reviews on this PR

[bryanck]

Yes, definitely, I’ll follow up, hopefully with something to make it automated.