fix(docker): restore apt cleanup chaining in cluster image

[pimlock]

Summary

Restore the missing && before rm -rf /var/lib/apt/lists/* in the cluster image's NVIDIA toolkit install step. Without it, rm -rf is parsed as extra apt-get install arguments and the cluster image build fails in CI.

Related Issue

Fixes the build failure introduced after #503 merged.

Changes

• add the missing shell chaining operator in deploy/docker/Dockerfile.images
• keep the cluster image package list unchanged; this only fixes the broken RUN command

Testing

• mise run pre-commit passes
• Local cluster image build passes

Checklist

• Follows Conventional Commits
• Commits are signed off (DCO)
• Architecture docs updated (not applicable)