[Static Runtime] Out version for fmod (#64046)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/64046
Test Plan:
Confirm out variant is used:
```
> //caffe2/benchmarks/static_runtime:static_runtime_cpptest -- --v=1
V0826 23:31:30.321382 193428 impl.cpp:1395] Switch to out variant for node: %4 : Tensor = aten::fmod(%a.1, %b.1)
```
Reviewed By: mikeiovine
Differential Revision: D30581228
fbshipit-source-id: dfab9a16ff8afd40b29338037769f938f154bf74
