Propagate translation state

Right now the translation propagation is modeled around content, but propagating approved state might be useful as well:

> We got feedback shortly from external reviewers who are usually working with other CAT-Tools and did not know Weblate before. They missed the propagation of approvals, when reviews are turned on. E.g.:
>
>
>
> Addtionally it is not really intuitive to propagate translations for strings in XLF-files that have different IDs but the same source. This is similar to the issue with 100%-Matches: https://github.com/WeblateOrg/weblate/pull/16870. I would like to propagate a translation if the source strings is exactly the same. The ID of the trans-unit is not relvant on this.

_Originally posted by @rsr-cs in [#3166](https://github.com/WeblateOrg/weblate/issues/3166#issuecomment-4073852303)_