[Static Runtime] Handle fallback graphs that are generated as part of the TE Fuser (#72945)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/72945
ghstack-source-id: 149429754
Test Plan:
```
buck run mode/opt //caffe2/benchmarks/static_runtime:static_runtime_cpptest — --gtest_filter=CpuFusion.FallbackGraph
```
Reviewed By: mikeiovine
Differential Revision: D34283840
fbshipit-source-id: 868bd340a50fe691797164524f2400d07998d304
(cherry picked from commit 80f60f2cc098e0132ececb321a35a1d3132fe676)