Rework for new clippy lints (#12736)

- **Clippy lint `assigning_clones`**
- **Clippy lint `legacy_numeric_constants`**
- **`clippy::float_equality_without_abs`**
- **`nu-table`: clippy::zero_repeat_side_effects**

---------

Co-authored-by: Ian Manske <ian.manske@pm.me>

crates/nu-command/src/bytes/at.rs

@@ -150,7 +150,7 @@ fn action(input: &Value, args: &Arguments, head: Span) -> Value {
                         head,
                     ),
                     Ordering::Less => Value::binary(
-                        if end == isize::max_value() {
+                        if end == isize::MAX {
                             val.iter()
                                 .skip(start as usize)
                                 .copied()