fix(ci): pass image_tag to shared-deploy-test in nightly (8015)

[pvijayakrish]

The nightly deploy-test jobs added in #12090 call shared-deploy-test.yml with image_suffix, but that workflow declares a required image_tag input and no image_suffix. GitHub rejects the whole file at parse time:

.github/workflows/nightly-ci.yml (Line: 610, Col: 11): Input image_tag
is required, but not provided while calling.
.github/workflows/nightly-ci.yml (Line: 614, Col: 21): Invalid input,
image_suffix is not defined in the referenced workflow.

That is a hard "Invalid workflow file" error, so no job in nightly-ci runs at all -- the scheduled nightly has been dead since #12090 merged.

Pass the full ACR tag from the corresponding copy-to-acr job, matching how pr.yaml and post-merge-ci.yml call the same workflow. shared-deploy- test.yml interpolates the value directly as
ai-dynamo/dynamo:${{ inputs.image_tag }}, so a bare suffix such as vllm-nightly would not have resolved to a real image either.

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Summary by CodeRabbit

• Chores
  • Improved nightly deployment validation for vLLM, SGLang, and TensorRT-LLM.
  • Tests now consistently validate the exact container image versions prepared for deployment, helping reduce misleading failures and improving confidence in nightly build results.

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[devin-ai-integration]

Devin Review found 1 potential issue.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

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📥 Commits

Reviewing files that changed from the base of the PR and between 9909e0a and 393d8a5.

📒 Files selected for processing (1)

• .github/workflows/nightly-ci.yml

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Walkthrough

The nightly workflow now passes ACR image tags from the vLLM, SGLang, and TensorRT-LLM copy jobs to their deploy tests.

Changes

Nightly deploy tag propagation

Layer / File(s)	Summary
Use copied ACR image tags .github/workflows/nightly-ci.yml	The vLLM, SGLang, and TensorRT-LLM deploy tests now use image_tag values from their corresponding ACR copy jobs.

Estimated code review effort: 1 (Trivial) | ~3 minutes

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description explains the cause, impact, and fix, but it omits the required Related Issues section and reviewer starting point.	Add the required headings, identify the files for reviewer focus, and select either a linked issue or the confirmed no-related-issue option.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the nightly CI fix and the change from image_suffix to image_tag.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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[pvijayakrish]

/ok to test 024471b