Add `python_version < "3.13"` for onnxscript dependency. (#24510)
### Description
<!-- Describe your changes. -->
Add `python_version < "3.13"` for `onnxscript` dependency in
tools/ci_build/github/linux/python/requirements.txt.
`onnxscript` has `onnx` as a dependency. Building the `onnx` wheel fails
with Python 3.13.
### Motivation and Context
<!-- - Why is this change required? What problem does it solve?
- If it fixes an open issue, please link to the issue here. -->
Fix pipeline build failures.