Avoid `eprintln!` for progress bar messages in CI

[szokeasaurusrex]

When progress bars are disabled, which is by default in CI, we log any messages that usually would go to the progress bar straight to stderr instead. In some CI configurations, however, any output to stderr is treated as an error. To avoid this for purely informational logs, we should instead use log::info!. As this is below our default log warning, the messages will be suppressed by default.

[linear[bot]]

CLI-244