Update pytorch nightly installation to use cpu version of torchtext (#3011)

* torchtext nightly should be cpu

* lint failure

Author: agunapal

ts_scripts/install_dependencies.py

@@ -133,7 +133,10 @@ def install_python_packages(self, cuda_version, requirements_file_path, nightly)
         if nightly:
             pt_nightly = "cpu" if not cuda_version else cuda_version
             os.system(
-                f"pip3 install numpy --pre torch torchvision torchtext torchaudio --force-reinstall --index-url https://download.pytorch.org/whl/nightly/{pt_nightly}"
+                f"pip3 install numpy --pre torch torchvision torchaudio --index-url https://download.pytorch.org/whl/nightly/{pt_nightly}"
+            )
+            os.system(
+                f"pip3 install --pre torchtext --index-url https://download.pytorch.org/whl/nightly/cpu"
             )
         else:
             self.install_torch_packages(cuda_version)