Include build's artifacts size and upload status in Build Teardown

It's best to include more information about build's artifacts such as the compressed artifact size and the upload status of the artifact.

As of now, there are no ways for users to identify whether the size of their artifacts is over the 1GB limit.
Hence, users would need to run command such as "du -sh <directory_name>" at the end of the build in order to confirm the size.