Fix download tests by changing channels for now #16781
                
     Merged
            
            
          
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One-line summary
Removes Nightly from l10n download tests as i686 builds listed are no longer available.
Significant changes and points to review
Following up from #16425 — the tests did their job and surfaced
firefox-145.0a1.*.linux-i686are not available going forward. This will need resolving via #16367 but this gives us some sanity check utility of the tests otherwise running for a while now.Issue / Bugzilla link
https://bugzil.la/1987132
See also #16765, #16367
Testing
docker compose run test pytest --base-url https://www.mozilla.org -m download┆Issue is synchronized with this Jira Task
┆Priority: P2
┆Sprint: Backlog