[chore][pkg/stanza] Flatten handling of lost files (#27454)

Subset of #27434

pkg/stanza/fileconsumer/roller_other.go

@@ -30,14 +30,17 @@ OUTER:
 			if newReader.Fingerprint.StartsWith(oldReader.Fingerprint) {
 				continue OUTER
 			}
-			if oldReader.FileName == newReader.FileName {
-				// At this point, we know that the file has been rotated. However, we do not know
-				// if it was moved or truncated. If truncated, then both handles point to the same
-				// file, in which case we should only read from it using the new reader. We can use
-				// the ValidateOrClose method to establish that the file has not been truncated.
-				if !oldReader.ValidateOrClose() {
-					continue OUTER
-				}
+
+			if oldReader.FileName != newReader.FileName {
+				continue
+			}
+
+			// At this point, we know that the file has been rotated. However, we do not know
+			// if it was moved or truncated. If truncated, then both handles point to the same
+			// file, in which case we should only read from it using the new reader. We can use
+			// the ValidateOrClose method to establish that the file has not been truncated.
+			if !oldReader.ValidateOrClose() {
+				continue OUTER
 			}
 		}
 		lostReaders = append(lostReaders, oldReader)