Avoid night torch CI not run because of irrelevant docker image failing to build

[ydshieh]

What does this PR do?

Currently, the workflow

.github/workflows/self-nightly-caller.yml

calls

  build_nightly_torch_ci_images:
    name: Build CI Docker Images with nightly torch
    uses: ./.github/workflows/build-nightly-ci-docker-images.yml

which builds 2 docker images in 2 jobs

  latest-with-torch-nightly-docker:
  nightly-torch-deepspeed-docker:

However, after #40306,

.github/workflows/self-nightly-caller.yml

only calls model-ci and no longer call deepspeed-ci, see

https://github.com/huggingface/transformers/pull/40306/files#r2287368451

And we only need to build latest-with-torch-nightly-docker image for model-ci instead of the 2 docker image.

Before this PR, we had nightly-torch-deepspeed-docker fails to build

https://github.com/huggingface/transformers/actions/runs/17431117913

and prevent the nightly torch CI to be run, which is not good.

This PR avoids this situation by adding if conditions in the 2 jobs in build-nightly-ci-docker-images.yml

[HuggingFaceDocBuilderDev]

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