[rl] Stateful Trainer Send: New Abstractions [1/N] (#48042)

Signed-off-by: haoaaron <ahao@anyscale.com>
Signed-off-by: Aaron Hao <ahao@anyscale.com>
Co-authored-by: Sumanth R Hegde <39546518+SumanthRH@users.noreply.github.com>

tools/pre_commit/check_forbidden_imports.py

@@ -39,6 +39,7 @@ CHECK_IMPORTS = {
             "vllm/distributed/device_communicators/shm_broadcast.py",
             "vllm/distributed/device_communicators/shm_object_storage.py",
             "vllm/distributed/weight_transfer/ipc_engine.py",
+            "vllm/distributed/weight_transfer/clients.py",
             "tests/distributed/test_weight_transfer.py",
             "vllm/utils/hashing.py",
             "tests/multimodal/media/test_base.py",