Right now, the `zipBaseName` variable in various publish.gradle files
contains the group ID and artifact ID for use by the combiner, however,
they are also duplicated in `artifactGroupId` and `baseArtifactId`,
leading to potential mistakes if they aren't updated together. This
fixes that by adding a new utility function `makeZipBaseName` to
automatically create the right name given a group ID and artifact ID.
This also fixes publishing for thirdparty subprojects, which didn't
update `zipBaseName`.
#8626 needs to switch to using reflection to load the robot class. Do
that with this PR so it's separate.
Also, remove the duplicated main files from the template, and instead
fixup vscode to handle this properly.
