don't lock when installing python packages (#33051)

frozen
old-commit-hash: 1e9738131d

tools/install_python_dependencies.sh

@@ -34,7 +34,7 @@ update_uv
 
 # TODO: remove --no-cache once this is fixed: https://github.com/astral-sh/uv/issues/4378
 echo "installing python packages..."
-uv --no-cache sync --all-extras
+uv --no-cache sync --frozen --all-extras
 source .venv/bin/activate
 
 echo "PYTHONPATH=${PWD}" > $ROOT/.env