`literalref` role doesn't work with autogenerated heading targets

## Situation

Automatically-generated heading targets referenced by the `ref` role don't render as links with the `literalref` role.

I suspect this is the role's fault, but we should determine if it's something in Kitbash first.

## Steps to reproduce

On any of our apps, try:

```rst
.. _test-page:

Test page
=========

.. kitbash-field:: craft_application.models.Project name

The :ref:`test-page-name` key.

The :literalref:`test-page-name` key.
```

Result:

> ## Test page
>
> ### name
>
> ...
>
> The [name](#name) key.
>
> The `test-page-name` key.

## Environment

I tested using the current Rockcraft stack and the standalone sphinx-roles extension, too.

Start by reproducing the issue with the provided reStructuredText example in both the Kitbash apps and the standalone sphinx-roles extension. Trace the literalref role and Kitbash's autogenerated heading targets to determine which component prevents the link, then verify that `:literalref:`test-page-name`` renders as a link like `:ref:` does.

Written by the indexing model from the issue text.