[EOSF-655] Investigate making 'preprints' text a variable

[hmoco]

Preprint appearances

All preprint appearances in the app are covered by the translation files (good job localization peeps!).

TODO: Check that ember-osf components don't break this pattern!

Also important: this will only probably work for providers (which is the only use case as far as I know anyways), as osf preprint assets have Preprints written all over them.

Solutions

need to involve talking to to the translation engine!

Will probably involve built-in options or monkey patches surrounding https://github.com/jamesarosen/ember-i18n