[CI Failure] Fix tests with missing TinyLlama-1.1B-Chat-v1.0-FP8-e2e

[mgoin]

Purpose

The nm-testing/TinyLlama-1.1B-Chat-v1.0-FP8-e2e model was modified and is failing these tests in the Blackwell runner with

  Value error, Invalid repository ID or local directory specified: 'nm-testing/TinyLlama-1.1B-Chat-v1.0-FP8-e2e'.

https://buildkite.com/vllm/ci/builds/34753/steps/canvas?sid=0199e0e1-07c3-4e2f-8932-18a67f8f1ed7

We can replace this model with a more stable base

Test Plan

Test Result

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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.

[gemini-code-assist]

Code Review

This pull request fixes a CI failure by replacing a missing Hugging Face model reference with a valid one in three test files. The change is correct and addresses the issue. I've added comments to update the misleading comments in the code that describe how the model name is used. I also recommend centralizing the hardcoded model name into a constant in a follow-up PR to improve maintainability, as it's currently duplicated across multiple files.