Usually, upload-symbols tasks run as part of the on-push graph; however, if a
push only touches platform-specific code, builds for other platforms may get
optimized out, along with the corresponding upload-symbols tasks. If release
promotion is triggered on such a push, we may end up shipping builds whose
symbols are missing from the symbols server, affecting downstream consumers
like crash-stats. To avoid this, ensure beetmover jobs (as an arbitrary
choice) pull in the upload-symbols tasks.
Differential Revision: https://phabricator.services.mozilla.com/D219768
c8299ffeda