Fix (DeepSpeed) docker image build issue
# What does this PR do?

Currently, the docker image build job [Latest PyTorch + DeepSpeed](https://github.com/huggingface/transformers/actions/runs/3834393836/jobs/6526754769) from time to time. The issue occurs after #20788 where `apex` is recompiled during the build. It seems a resource issue (most likely the memory issue) due to the parallel build (multiple worker). So set `MAX_JOB=1` to avoid the failure.

This will increase the build time to `1h30m`, but we have to build 2 same image (for daily CI and push CI), therefore 3h, and this is way too long. Previously those 2 images are built sequentially due to some issue, but now it seems the issue is gone and we can build them in parallel.
_The documentation is not available anymore as the PR was closed or merged._