fix(progress): Replace eprintln! with log::info! in CI fallback

When progress bars are disabled (e.g. in CI where stderr is not a terminal), `finish_with_duration` printed its completion message via `eprintln!`. Some CI configurations treat any stderr output as an error, causing false positives.

Use `log::info!` instead, which is suppressed at the default `Warn` log level. Users who want to see these messages can use `--log-level info`. The `> ` prefix is dropped since the log framework adds its own formatting.

Closes #3016
Closes [CLI-244](https://linear.app/getsentry/issue/CLI-244/avoid-eprintln-for-progress-bar-messages-in-ci)

Author: szokeasaurusrex

src/utils/progress.rs

@@ -71,7 +71,7 @@ impl ProgressBar {
             inner.finish_with_message(&msg);
             logging::set_progress_bar(None);
         } else {
-            eprintln!("> {msg}");
+            log::info!("{msg}");
         }
     }