change duration mod duration to duration instead of float (#13300)

# Description

closes #13298 so that duration mod duration / duration = duration

### Before
```nushell
(92sec mod 1min) / 1sec
Error: nu::parser::unsupported_operation

  × division is not supported between float and duration.
   ╭─[entry #5:1:1]
 1 │ (92sec mod 1min) / 1sec
   · ────────┬─────── ┬ ──┬─
   ·         │        │   ╰── duration
   ·         │        ╰── doesn't support these values
   ·         ╰── float
   ╰────
```
### After
```nushell
❯ (92sec mod 1min) / 1sec
32
```

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crates/nu-parser/src/type_check.rs

@@ -292,7 +292,7 @@ pub fn math_result_type(
                 (Type::Filesize, Type::Filesize) => (Type::Float, None),
                 (Type::Filesize, Type::Int) => (Type::Filesize, None),
                 (Type::Filesize, Type::Float) => (Type::Filesize, None),
-                (Type::Duration, Type::Duration) => (Type::Float, None),
+                (Type::Duration, Type::Duration) => (Type::Duration, None),
                 (Type::Duration, Type::Int) => (Type::Duration, None),
                 (Type::Duration, Type::Float) => (Type::Duration, None),