[CI/Build] Fix Dockerfile.rocm_base image build for ROCm 7.2

[jbelloncastro]

Purpose

To build a vllm Docker image using Ubuntu ROCm 7.2 as base.

• Install pkg-config and liblzma DEB packages.
• This fixes a CMake configuration error when building triton.

Test Plan

DOCKER_BUILDKIT=0 docker build \
    -t 'vllm/rocm-dev:7.2' \
    -f Dockerfile.rocm_base \
    --build-arg BASE_IMAGE=rocm/dev-ubuntu-22.04:7.2-complete \
    .

Test Result

Image builds correctly

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Essential Elements of an Effective PR Description Checklist

• The purpose of the PR, such as "Fix some issue (link existing issues this PR will resolve)".
• The test plan, such as providing test command.
• The test results, such as pasting the results comparison before and after, or e2e results
• (Optional) The necessary documentation update, such as updating supported_models.md and examples for a new model.
• (Optional) Release notes update. If your change is user facing, please update the release notes draft in the Google Doc.

[github-actions]

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