docs(trtllm): Update the trtllm installation instructions

[tanmayv25]

Overview:

Updates the installation instructions for TRTLLM. The tensorrt-llm pip installation is fragile and might not work OOTB. We are also not exercising the ai-dynamo[trtllm] in our CI which makes instructions in our documentation in regards to trtllm inaccurate.

Related Issues

🚫 This PR is NOT linked to an issue:

• Confirmed — no related issue

Summary by CodeRabbit

• Documentation
  • Clarified local installation guidance to show that PyPI installs are supported for vLLM and SGLang only.
  • Updated TensorRT-LLM setup instructions to direct users to the container-based installation path.
  • Refined troubleshooting guidance for Python version compatibility with TensorRT-LLM.
  • Aligned release artifact instructions with the recommended container workflow for TensorRT-LLM.

[github-actions]

🌿 Fern Docs Preview: https://nvidia-preview-019f21b0-ccd2-75bf-ae77-f0d33dc41dcc.docs.buildwithfern.com/dynamo/dev

[coderabbitai]

Walkthrough

Documentation updates across three files remove TensorRT-LLM from the PyPI installation path (Option B), restricting it to vLLM and SGLang only. TensorRT-LLM users are redirected to the NGC tensorrtllm-runtime container. Troubleshooting and release-artifacts reference docs are updated accordingly.

Changes

TensorRT-LLM container-only redirect

Layer / File(s)	Summary
Option B restriction and troubleshooting (EN + ZH) docs/getting-started/local-installation.md, docs/getting-started/local-installation.zh-CN.md	Option B is now marked vLLM/SGLang-only; TensorRT-LLM pip install steps are removed; Python 3.11 troubleshooting updated to offer tensorrtllm-runtime container as alternative.
Release artifacts NGC redirect docs/reference/release-artifacts.md	Python Wheels section and Quick Install Commands replace ai-dynamo[trtllm] pip instructions with a docker pull for the tensorrtllm-runtime:1.2.1 NGC image.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description check	✅ Passed	The description has an overview and the required no-issue confirmation, but it omits the Details and reviewer-start sections.
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.
Title check	✅ Passed	The title accurately summarizes the main documentation change: revising TRTLLM installation instructions.

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[coderabbitai]

Actionable comments posted: 2

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@docs/getting-started/local-installation.md`:
- Around line 203-204: The TensorRT-LLM fallback note in the local installation
guide still suggests Python 3.10 or 3.12 as a valid option, but the updated flow
should be container-only. Update the affected paragraph in the
local-installation guidance to remove any local Python/PyPI fallback language
and keep only the `tensorrtllm-runtime` container path (Option A), making sure
the surrounding Option B wording is consistent with the `TensorRT-LLM` install
flow.

In `@docs/getting-started/local-installation.zh-CN.md`:
- Around line 203-204: The local-installation guidance still suggests Python
3.10 or 3.12 as a TensorRT-LLM fallback, but the updated flow should be
container-only. Update the note in the TensorRT-LLM section of the
getting-started local installation doc so it no longer mentions any local Python
version workaround, and make the wording around the TensorRT-LLM install path
consistent with the option that uses the tensorrtllm-runtime container.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

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📥 Commits

Reviewing files that changed from the base of the PR and between 0adf974 and 244286d.

📒 Files selected for processing (3)

• docs/getting-started/local-installation.md
• docs/getting-started/local-installation.zh-CN.md
• docs/reference/release-artifacts.md