ci(trtllm): bump CI wheel to TensorRT-LLM 1.3.0rc18

[slin1237]

Description

CI-only bump of the TensorRT-LLM e2e wheel from 1.3.0rc14 to 1.3.0rc18. The Docker release pipelines (release-trtllm-docker.yml, nightly-engine-docker.yml) are untouched and keep their rc10 base images.

Changes (scripts/ci_install_trtllm.sh only)

• TRTLLM_VERSION="1.3.0rc14" → "1.3.0rc18"
• Header comment reworded so the rc14 feature provenance (gRPC serve from PR #11037, Harmony parser fixes #12045/#12467 for SMG test(e2e): enable Harmony tests on vLLM and TRT-LLM backends #801) reads correctly against the new pin.
• NCCL_VERSION_CONSTRAINT deliberately unchanged: upstream requirements.txt at tag v1.3.0rc18 pins the identical nvidia-nccl-cu13>=2.28.9,<=2.29.2 (and the same torch>=2.10.0,<=2.11.0a0, cuda-python>=13).

Test Plan

• bash -n scripts/ci_install_trtllm.sh — clean.
• Verified tensorrt_llm-1.3.0rc18-cp312-cp312-manylinux_2_28_x86_64.whl is published on pypi.nvidia.com (public PyPI stops at rc15; the script already resolves via --pre --extra-index-url https://pypi.nvidia.com, so the pin is installable as-is).
• Real gate: this PR's trtllm GPU e2e jobs.

Summary by CodeRabbit

• Chores
  • Updated CI installation to use TensorRT-LLM pre-release version 1.3.0rc18, which includes gRPC serve and Harmony parser improvements.

[gemini-code-assist]

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro

Run ID: ab407dd6-707d-4132-bc1a-d69f396d9cf6

📥 Commits

Reviewing files that changed from the base of the PR and between 06d761c and 9d1d81f.

📒 Files selected for processing (1)

• scripts/ci_install_trtllm.sh

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📝 Walkthrough

Walkthrough

The CI installation script is updated to pin TensorRT-LLM pre-release wheel version 1.3.0rc18 instead of 1.3.0rc14, with inline documentation revised to reflect gRPC serve and Harmony parser fixes included in the newer version.

Changes

TensorRT-LLM Version Upgrade

Layer / File(s)	Summary
Upgrade TensorRT-LLM version to 1.3.0rc18 scripts/ci_install_trtllm.sh	Version constant bumped from 1.3.0rc14 to 1.3.0rc18 with inline documentation updated to describe included gRPC serve and Harmony parser fixes.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

• lightseekorg/smg#845: Related version pin update in workflow defaults for the same TensorRT-LLM dependency.
• lightseekorg/smg#1501: Previous version pin update to scripts/ci_install_trtllm.sh with similar install logic and comment adjustments.

Suggested labels

ci

Suggested reviewers

• gongwei-130
• CatherineSue
• key4ng
• XinyueZhang369

Poem

🐰 A rabbit hops through CI scripts with glee,
One-point-four to one-point-eight, naturally!
The TensorRT wheels now spin more true,
With fixes for gRPC, both fresh and new. ✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and specifically summarizes the main change: bumping the TensorRT-LLM wheel version from 1.3.0rc14 to 1.3.0rc18 in CI scripts.
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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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch ci/trtllm-1.3.0rc18

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[claude]

👋 The PR description doesn't fully follow PULL_REQUEST_TEMPLATE.md:

• Missing header: ### Problem
• Missing header: ### Solution

Please update the PR description so reviewers have the context they need.

[claude]

Straightforward CI dependency pin bump (rc14 → rc18) with a matching comment update. No logic or config changes. LGTM.