increase pip timeout to 1000s to avoid connection resets (#1535)

.kokoro/github/ubuntu/gpu/build.sh

@@ -35,23 +35,25 @@ pip install -U pip setuptools psutil
 if [ "${KERAS2:-0}" == "1" ]
 then
  echo "Keras2 detected."
- pip install -r requirements-common.txt --progress-bar off
- pip install tensorflow-text==2.15 tensorflow[and-cuda]~=2.15 keras-core
+ pip install -r requirements-common.txt --progress-bar off --timeout 1000
+ pip install tensorflow-text==2.15 tensorflow[and-cuda]~=2.15 keras-core \
+ --timeout 1000
 
 elif [ "$KERAS_BACKEND" == "tensorflow" ]
 then
  echo "TensorFlow backend detected."
- pip install -r requirements-tensorflow-cuda.txt --progress-bar off
+ pip install -r requirements-tensorflow-cuda.txt --progress-bar off \
+ --timeout 1000
 
 elif [ "$KERAS_BACKEND" == "jax" ]
 then
  echo "JAX backend detected."
- pip install -r requirements-jax-cuda.txt --progress-bar off
+ pip install -r requirements-jax-cuda.txt --progress-bar off --timeout 1000
 
 elif [ "$KERAS_BACKEND" == "torch" ]
 then
  echo "PyTorch backend detected."
- pip install -r requirements-torch-cuda.txt --progress-bar off
+ pip install -r requirements-torch-cuda.txt --progress-bar off --timeout 1000
 fi
 
 pip install --no-deps -e "." --progress-bar off