vLLM CPU x86 smoke tests

[edwardquarm]

Description

jira: https://issues.redhat.com/browse/RHOAIENG-43474
Support running vLLM CPU x86 validation against model car container as part of RHOAI 3.3 vLLM CPU Tech preview epic.

The vLLM CPU template has been merged into rhds and will be available in rhoai-3.3.

How Has This Been Tested?

uv run pytest -vv tests/model_serving/model_runtime/model_validation/test_modelvalidation.py \
  --model_car_yaml_path=./tests/model_serving/model_runtime/model_validation/sample_modelcar_config.yaml \
  --vllm-runtime-image=quay.io/rh-ee-equarmjn/vllm-cpu \
  --supported-accelerator-type=CPU_x86 \
  --registry-host=registry.redhat.io \
  --snapshot-update

Merge criteria:

• The commits are squashed in a cohesive manner and have meaningful messages.
• Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• The developer has manually tested the changes and verified that the changes work

Summary by CodeRabbit

• New Features
  • Added support for x86 CPU accelerator type, enabling model serving on x86-based CPU systems.
  • Extended runtime templates to include VLLM support for x86 CPU architecture.
  • Updated accelerator type mappings to support new x86 CPU configurations.

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[coderabbitai]

📝 Walkthrough

Walkthrough

The pull request adds support for a new CPU x86 accelerator type by introducing VLLM_CPU_x86 runtime template, CPU_x86 accelerator identifier, and corresponding label definitions in core constants, plus configuration mappings in test validation files.

Changes

Cohort / File(s)	Summary
Core Constants utilities/constants.py	Added VLLM_CPU_x86 to RuntimeTemplates; introduced CPU_x86 to AcceleratorType and updated SUPPORTED_LISTS to include it; created nested CPU class under Labels with CPU_x86 label constant
Test Validation Mappings tests/model_serving/model_runtime/model_validation/constant.py	Added CPU_x86 entry to ACCELERATOR_IDENTIFIER mapping to Labels.CPU.CPU_x86 and corresponding entry in TEMPLATE_MAP pointing to RuntimeTemplates.VLLM_CPU_x86

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'vLLM CPU x86 smoke tests' directly relates to the PR's main objective of adding support for running vLLM CPU x86 validation tests. It clearly summarizes the primary change.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

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✨ Finishing touches

• 📝 Generate docstrings

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[brettmthompson]

/lgtm

[github-actions]

Status of building tag latest: success.
Status of pushing tag latest to image registry: success.