ciflow/trunk/199099: [c10d][torchcomms] Propagate dynamic options (#199099)
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What happened
Summary: Pull Request resolved: #199099 TorchComms dynamic communicators need creation options before their first configuration, but the shared c10d factory previously discarded those options. Forward timeout and enable_reconfigure into new_comm() only for dynamic creation, preserving compatibility for static communicators. Construct BackendWrapper only from the communicator so membership has one source of truth and…
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