backup - show excluded files and directories in verbose mode - text/JSON (#21887)

internal/ui/backup/text.go

@@ -158,3 +158,7 @@ func (b *textProgress) Finish(id restic.ID, summary *archiver.Summary, dryRun bo
 		}
 	}
 }
+
+func (b *textProgress) ExcludedItem(path string) {
+	b.VV("excluded %s", path)
+}