Support label-content-name-mismatch Technique F96 failure

Ticket https://github.com/dequelabs/axe-core/issues/4678 pointed out the following example does not fail the `label-content-name-mismatch` rule even though it is a [failed example of Technique F96](https://www.w3.org/WAI/WCAG21/Techniques/failures/F96)

```html

deque labs are great

```

The rule [specifically ignores](https://www.w3.org/WAI/standards-guidelines/act/rules/2ee8b8/proposed/#applicability) elements that do not have an `aria-label` or `aria-labelledby` attribute, so supporting this would be an enhancement to the rule.

Start by reading the label-content-name-mismatch rule and its applicability behavior, especially the handling of aria-label and aria-labelledby. Use the Technique F96 example as the regression case; done means the provided link markup fails the rule while existing cases continue to pass.

Written by the indexing model from the issue text.