Reuse failed merge queue workflows - #5815
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Description of Changes
If a PR fails in the merge queue because of a flake, it should only have to rerun the failed job(s) when re-submitted to the queue. Unless of course another PR jumps in front of it.
Concretely, a PR can only reuse an existing merge queue workflow if it has the same git tree. This means that if
Ais in the merge queue followed byB, butBfails andAmerges,Bwill be able to pick up where it left off as long as nothing else jumps in front of it in the merge queue.API and ABI breaking changes
None
Expected complexity level and risk
2
Testing
N/A