Add publicly accessible jar

[ryanmcdowell]

Currently each user must pull down the source, compile, and host their own version of the jar. Create a public version version so users can easily reference and list all versions:

gs://hive-bigquery-storage-handler/hive-bigquery-storage-handler-1.0-shaded.jar

Ideally these jars can be built and deployed using a cloudbuild.yml file on release tags.