Report errors that occur on file operations in ls (#12033)

Currently errors just create empty entries inside of resulting
dataframes.

This changeset is meant to help debug #12004, though generally speaking
I do think it's worth having ways to make errors be visible in this kind
of pipeline be visible

An example of what this looks like

<img width="954" alt="image"
src="https://github.com/nushell/nushell/assets/1408472/2c3c9167-2aaf-4f87-bab5-e8302d7a1170">

crates/nu-command/src/filesystem/ls.rs

@@ -431,7 +431,7 @@ fn ls_for_one_pattern(
                 Err(err) => Some(Value::error(err, call_span)),
             }
         }
-        _ => Some(Value::nothing(call_span)),
+        Err(err) => Some(Value::error(err, call_span)),
     })))
 }