Add back use-pt-pinned-commit in setup-linux.c

Author: mergennachin

.ci/scripts/setup-linux.sh

@@ -16,8 +16,8 @@ read -r BUILD_TOOL BUILD_MODE EDITABLE < <(parse_args "$@")
 # have already been installed, so we use PyTorch build from source here instead
 # of nightly. This allows CI to test against latest commits from PyTorch
 if [[ "${EDITABLE:-false}" == "true" ]]; then
-  install_executorch --editable
+  install_executorch --use-pt-pinned-commit --editable
 else
-  install_executorch
+  install_executorch --use-pt-pinned-commit
 fi
 build_executorch_runner "${BUILD_TOOL}" "${BUILD_MODE}"