Allow non-link text in `terms and condition` via config.json

### Your use case

#### What would you like to do?
I'd like to add text in the "Legal" block in Help and About page which are not pure links, but only text or even a mix of text and links (resulting in e.g. `Partx by someone`).

#### Why would you like to do it?
To add information on the background of the app, who has which role, who manages and controls what etc.

#### How would you like to achieve it?
An option in `config.json` - configurable without building the client to changes.

### Have you considered any alternatives?

- Using option `terms_and_conditions_links` to render links works, for text the text is rendered in blue (as links).
- Adapting `terms_and_conditions_links` to allow text without links: https://github.com/matrix-org/matrix-react-sdk/pull/10301. That resulting in the suggestion to open an issue here: https://github.com/matrix-org/matrix-react-sdk/commit/4c8cea43342d4768f8f0896581e7ba062aeb64a5#r103281803

### Additional context

_No response_