Translations coordinator cannot add new language

### Describe the issue

A user with the Translations coordinator role cannot add a new language to a component group.

### I already tried

- [x] I've read and searched [the documentation](https://docs.weblate.org/).
- [x] I've searched for similar filed issues in this repository.

### Steps to reproduce the behavior

1. Make sure to have a Team which exclusively has the 'Translations coordinator' role
2. Make a user part of this Team
3. As that user, go to Project > Language > Component group
OR
As that user, go to Project > Component group > Languages

### Expected behavior

On the component group page with the list of components, the list of missing components are expected to show up as not-yet-existing, and they can be clicked to be added:

On the languages list, the plus button to add a new language is expected to show.

### Screenshots

The user in question is part of the following teams:

Each of the teams map to their equivalent role:

The view of the user: Project > Language > Component group

### Exception traceback

```pytb

```

### How do you run Weblate?

weblate.org service

### Weblate version

?

### Weblate deploy checks

```shell

```

### Additional context

Our translations coordinator notes that adding the component (group) in a language was possible before. As far as we can recall, we have not changed the user's permissions, so we suspect it's a bug.

CC: @delthia

Start by reproducing the issue with a team limited to the Translations coordinator role, using the two Component group language entry points described in the report. Trace the permission checks controlling missing-component links and the add-language plus button. Done means the coordinator can add a language or component group from both relevant views without granting broader permissions.

Written by the indexing model from the issue text.