Add to torchbench relative path search (#134871)

Summary:
Add to relative path search in benchmark. This enables user to run `torchbench.py` inside the `pytorch/benchmark/dynamo` folder when `torchbench` repo is cloned in the same level as `pytorch`

X-link: pytorch/pytorch#134871
Approved by: https://github.com/FindHao

Reviewed By: kit1980

Differential Revision: D62163655

Pulled By: yiming0416

fbshipit-source-id: dbfe2fdd45a28f2e1de41af84da0809db9cd6cd1

userbenchmark/dynamo/dynamobench/torchbench.py

@@ -56,6 +56,9 @@ def setup_torchbench_cwd():
         "../../torchbenchmark",
         "../../torchbench",
         "../../benchmark",
+        "../../../torchbenchmark",
+        "../../../torchbench",
+        "../../../benchmark",
     ):
         if exists(torchbench_dir):
             break