Reduce the log level from 'info' to 'debug' on some internal components
of Flamenco Worker. This makes the console output slightly less noisy,
and it's unlikely that these particular messages are commonly needed.
Change the package base name of the Go code, from
`git.blender.org/flamenco` to `projects.blender.org/studio/flamenco`.
The old location, `git.blender.org`, has no longer been use since the
[migration to Gitea][1]. The new package names now reflect the actual
location where Flamenco is hosted.
[1]: https://code.blender.org/2023/02/new-blender-development-infrastructure/
Fix T100757 by reducing the log level to "info" when Blender writes output
to a file format the Worker cannot handle. Such cases are expected, and
now no longer result in an error message.
Workers now send output produced by Blender (limited to PNG and JPEG
images, currently) to Manager. This is done by converting to JPEG first,
then sending the bytes via the Flamenco API to the Manager.
