changefeedccl: mark description as safe for log redaction

Previously, logs in maybeLogBehindSpan would mark the description string
(i.e., coordinator or aggregator) as redactable. This is not sensitive
information, so it should not be redacted.

Epic: none

Release note: none

Author: rharding6373

pkg/ccl/changefeedccl/changefeed_processors.go

@@ -2052,12 +2052,12 @@ func maybeLogBehindSpan(
 
 	if frontierChanged && slowLogEveryN.ShouldProcess(now) {
 		log.Dev.Infof(ctx, "%s new resolved timestamp %s is behind by %s",
-			description, frontierTS, resolvedBehind)
+			redact.Safe(description), frontierTS, resolvedBehind)
 	}
 
 	if slowLogEveryN.ShouldProcess(now) {
 		s := frontier.PeekFrontierSpan()
-		log.Dev.Infof(ctx, "%s span %s is behind by %s", description, s, resolvedBehind)
+		log.Dev.Infof(ctx, "%s span %s is behind by %s", redact.Safe(description), s, resolvedBehind)
 	}
 }