Don't use python setup.py develop as it's deprecated (#5235)

Signed-off-by: Anatoly Myachev <[email protected]>

Author: anmyachev

.github/workflows/third-party-benchmarks.yml

@@ -121,7 +121,7 @@ jobs:
 
           git submodule sync
           git submodule update --init --recursive
-          python setup.py develop
+          pip install -v -e .
 
           cd ../benchmarks/third_party/e2e-flex_attention
 

scripts/install-pytorch.sh

@@ -276,7 +276,7 @@ install_pytorch
 # ImportError: Failed to load PyTorch C extensions:
 #     ...
 #     This error can generally be solved using the `develop` workflow
-#         $ python setup.py develop && python -c "import torch"  # This should succeed
+#         $ pip install -v -e . && python -c "import torch"  # This should succeed
 #     or by running Python from a different directory.
 cd $BASE
 python -c "import torch;print(torch.__version__)"