aria-sort not flagged on non-th elements without header role

### Product

axe-core

### Product Version

latest

### Latest Version

- [x] I have tested the issue with the latest version of the product

### Issue Description

**Description**

`aria-sort` should only be allowed on elements with role `columnheader` or `rowheader` (including native `th` with implicit header role).

However, axe-core does not flag cases where `aria-sort` is applied to non-`th` elements that do not have an explicit `rowheader` or `columnheader` role (e.g., `div`, `span`, `td` without appropriate role).

**Reproduction**

```html

```

Expected: Violation reported (invalid use of `aria-sort`)
Actual: No violation reported.

**Reference**

For comparison, see this related unit test asserting correct `aria-sort` usage:
[https://github.com/evan90levesque-cmyk/Level_Access_Engine/blob/a37445427c317244d2145c67eae8618fb05115e5/src/Tests/Automatic/Test_14.js#L19](https://github.com/evan90levesque-cmyk/Level_Access_Engine/blob/a37445427c317244d2145c67eae8618fb05115e5/src/Tests/Automatic/Test_14.js#L19)

It explicitly validates that `aria-sort` is only used on elements with appropriate header roles.