This is propping up due to auth. The auth fix involved a DSI piece and a 10gen/workloads piece. The fix in workloads broke the tests that misconfigure auth, and the fix to that in DSI is only available in the master branch. This leaves older sys-perf projects with some broken tests.
Repurposing this ticket to backport system-perf.yml and perf.yml to make all performance projects use the master DSI branch. Once this is done the legacy branch can be deleted. This should be done once PM-1822 is complete.