GitLab

This adds 3 new SR:
- software-py3.cfg: default CPython (3.10)
- software-py3.13.cfg: CPython 3.13
- software-pypy3.cfg: PyPy 3.9

The change about private-tmpfs is to delegate to neoppod.git
the setup of a private tmpfs, via the recently added
NEO_PRIVATE_TMPFS environment variable.