[torch][JIT] Predicate uses of RPC APIs on `torch.distributed.rpc.is_available()` (#58887)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/58887
There are some callsites of `torch.distributed.rpc.XXX` APIs that are compiled
or not based on `USE_RPC`. However, `torch::deploy`, at least for now,
is compiled with `USE_RPC=1`, but the `torch.distributed.rpc.XXX` APIs used by
the aforementioned pieces of code are not available (i.e.
`torch.distributed.rpc.is_available()` returns `False`). This can cause
Torchscript compilation to fail, even if the code being compiled doesn't use
RPC.
This commit fixes this problem (at least temporarily) by predicating the use
all thse `torch.distributed.rpc` APIs on the value of
`torch.distributed.rpc.is_available()`.
Test Plan: Ran packaged XLM-R model with C++ benchmark.
Reviewed By: suo
Differential Revision: D28660925
fbshipit-source-id: fbff7c7ef9596549105e79f702987a53b04ba6f9
