Removed OSG modules dependency

[rynge]

OSG is no longer providing modules in the environment. This PR removes the modules dependency from both the job submit file, as well as the job wrapper. We are also moving to newer software environments, so these changes needs to be tested. In summary:

• Removed modules and RHEL7 from the job requirements
• Non-GPU jobs will run on Rocky 9 by default
• For GPU jobs, use the newish require_gpus attribute to specify the lowest GPU capability for the jobs.
• Move the lowest capability to 7.0, as that is probably the lowest you will see in the pool
• Moved to tensorflow 2.15 image
• For Python jobs, just depend on the Python environment in the Rocky 9 base image - this needs some extra testing as there might be Python modules missing.

[mkandes]

@kenneth59715 - It's been awhile, but I think this needs to get deployed on nsgdev first? I don't think I can test this directly on nsgosg myself.