Cleanup needlessly holding Exceptions in the can_match phase #127495
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Exceptions can be quite expensive heap-wise and we don't use them here any longer, not even for logging -> replace atomic array with a set of shard indices and dry up the logic a tiny bit as a result as well.
We could also adjust the response class to not even have the exception but with #127471 inbound, the actual transport responses will shortly turn into a BwC only thing anyway.