add python version dependency for modelopt (#3507)

Author: lanluo-nvidia

tests/py/requirements.txt

@@ -9,5 +9,5 @@ pytest-xdist>=3.6.1
 pyyaml
 timm>=1.0.3
 transformers==4.49.0
-nvidia-modelopt[all]~=0.27.0; python_version < "3.13"
+nvidia-modelopt[all]~=0.27.0; python_version >'3.9' and python_version <'3.13'
 --extra-index-url https://pypi.nvidia.com