Fix use after free in tensorpipe agent (#87627)
Fixes #87359, which identifies use after free for reverse device maps. This is only in the dynamic RPC feature and not effecting stable RPC code path.
Unfortunately the test `TensorPipeRpcTest.test_dynamic_rpc_existing_rank_can_communicate_with_new_rank_cuda` that is failing is also running into separate issue. I've temporarily disabled some of the test code to investigate the error in asychronously.
Testing plan:
- tested all the dynamic RPC tests
Pull Request resolved: https://github.com/pytorch/pytorch/pull/87627
Approved by: https://github.com/rohan-varma
