feat: update chapter 03 to use new LAIF container

[marlon-tobaben]

This PR closes #79 , only open issue is that HDF5 is terribly slow with one worker, this must be a bug. This was already in older version of the repository. We should maybe check this. New ideas based on PR: #103 and #104.

General changes

• Remove disclaimer that 03 hasn't been ported from README.MDs
• Update scripts to use relative paths and not specific project folders
• Removed env vars: export MPICH_MPIIO_STATS=1 and export MPICH_MEMORY_REPORT=1

Simple benchmarks (using tiny-imagenet-200)

• Update to new LUMI AIF container
• Use squashFS venv for LMDB (and add script to create squashFS venv)
• HDF5 and squashFS use only the container
• Add instructions to README.MD for all steps
• Make post-processing script more robust (used to expect time spent on line 4 of log, but this can easily break)

Training benchmarks with vision transformer (using tiny-imagenet-200)

• removed profiling as it was not documented at all
• added a version of the script in 01 that allows to compare runtime between the three file formats
• added post-processing script for this and instructions to README

Benchmarks using larger version of ImageNet (ImageNet-1k)

• I removed them for now as the adaptation requires large amount of work
• Added Chapter 03: Add ImageNet-1k version of the benchmark #102 to the issues to keep track of it.
• Downloading should be done a bit differently now that ImageNet-1k is on Huggingface; see https://huggingface.co/datasets/ILSVRC/imagenet-1k