Mariusz Felisiak bd389a832a [3.1.x] Refs #31040, Refs #31224 -- Prevented cycles in exceptions chain.
Async exception handling was raising an exception that was creating a
cycle in the exception chain (by re-raising an exception in
sync_to_async that was already being handled).

Thanks Chris Jerdonek for detailed analysis.
Backport of d94a9aa0557a459a5b9b7b82a8c043de14f8b1a0 from master
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..
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