The "Utility" name better matches its intended generic use case and
avoids overloaded terminology with unit testing (e.g. the need to name
the opmode annotation `@TestOpMode`).
The driver station will also be updated to reflect this change.
#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.
