Installs cuda13 on arm builds for Spark

[kellyguo11]

Description

Running on Spark requires the latest nightly torch build. Added a check in the installation script for ARM platforms and force an install of the nightly torch build if ARM architecture is detected.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

Checklist

• I have run the pre-commit checks with ./isaaclab.sh --format
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• I have updated the changelog and the corresponding version in the extension's config/extension.toml file
• I have added my name to the CONTRIBUTORS.md or my name already exists there