Fix cuda 12.2 container

[benjiemc]

Hi there,

This PR modifies the cuda 12-2 container specification to get it working.

I encountered some issues while trying to use TCRmodel2 with the cuda 12-2 container with the current spec.

Steps to reproduce

# from the tcrmodel2 directory
sudo singularity build tcrmodel2.sif singularity/tcrmodel2_singularity_cuda12-2.def 1> container_build_log.txt 2>&1
... # Ammend script with correct file paths
bash singularity/run_tcrmodel2_singularity.sh

Gives this error:

Traceback (most recent call last):
  File "/opt/tcrmodel2/run_tcrmodel2.py", line 9, in <module>
    from absl import app, flags
ModuleNotFoundError: No module named 'absl'

Here is the container build log: container_build_log.txt. There are a couple of failing steps.