utr: Improve clearing previous line when printing to a single terminal line

The old recplacing line was messy and would print spaces over old lines
instead use a clear line code

Bug: 1519709
Change-Id: Icda6cf97c5d07eaa2ad30a3f5c0fd717d67ab196
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5345136
Commit-Queue: Struan Shrimpton <sshrimp@google.com>
Reviewed-by: Ben Pastene <bpastene@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1268665}