Getting this to run on Try through fuzzy or other selectors means we either need to remove or get past the `run-on-releases` selector used by this job. The former is not ideal, as it causes the job to begin to run on beta and other releases (which will probably just end up failing), so I'm adjusting `release_type` on Try to be set to Nightly.
Based on what I see `release_type` being used for, and what `run-on-releases` is set to, I believe this shouldn't have impacts outside of what I intend...but it's difficult to be absolutely certain of that. In any case, there is virtually zero chance that this could bust anything outside of Try.
Differential Revision: https://phabricator.services.mozilla.com/D192262
9bc264fbc5