remove --column from length command and remove record processing (#10091)

# Description

This PR removes `record` processing from the `length` command. It just
doesn't make sense to try and get the length of a record. This PR also
removes the `--column` parameter. If you want to list or count columns,
you could use `$table | columns` or `$table | columns | length`.

close #10074 

### Before

![image](https://github.com/nushell/nushell/assets/343840/83488316-3ec4-4c32-9583-00341a71f46f)

### After
Catches records two different ways now.
with the `input_output_types` checker

![image](https://github.com/nushell/nushell/assets/343840/ca67f8b6-359e-4933-ab4d-1b702f8d79cf)

and with additional logic in the command for cases like `echo`

![image](https://github.com/nushell/nushell/assets/343840/99064351-b208-4bd3-bab9-535f97cd7ad4)


# User-Facing Changes
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src/tests/test_table_operations.rs

@@ -264,7 +264,7 @@ fn update_will_insert() -> TestResult {
 #[test]
 fn length_for_columns() -> TestResult {
     run_test(
-        r#"[[name,age,grade]; [bill,20,a] [a b c]] | length -c"#,
+        r#"[[name,age,grade]; [bill,20,a] [a b c]] | columns | length"#,
         "3",
     )
 }