Remove deprecated examples/llm_autodeploy (#1797)

Remove the AutoQuant + TensorRT-LLM AutoDeploy example, deprecated in
0.45, after the migration period. Record the removal under the 0.46
Backward Breaking Changes section. Users should use TensorRT-LLM's
AutoDeploy directly together with ModelOpt PTQ in examples/llm_ptq.

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new example, new tests, documentation. -->

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### Usage

```python
# Add a code snippet demonstrating how to use this
```

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<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **Documentation**
* Updated AutoDeploy guidance to a workflow: quantize with ModelOpt PTQ
(via `llm_ptq`) to produce a unified Hugging Face checkpoint, then
deploy with TensorRT-LLM AutoDeploy.
* Revised Hopper notes to recommend using FP8 (and refreshed related
optimization guidance).
* **Breaking Changes**
* Removed the deprecated `examples/llm_autodeploy` example and
documented the new recommended approach.
* **Chores**
* Dropped obsolete example docs, scripts, and coverage; adjusted example
test workflow to exclude `llm_autodeploy`; updated ownership mapping for
the removed example path.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Signed-off-by: Fridah-nv <201670829+Fridah-nv@users.noreply.github.com>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.github/workflows/example_tests.yml

@@ -48,7 +48,7 @@ jobs:
       pip_install_extras: "[hf,dev-test]"
       runner: ${{ startsWith(github.ref, 'refs/heads/pull-request/') && 'linux-amd64-gpu-rtxpro6000-latest-1' || 'linux-amd64-gpu-rtxpro6000-latest-2' }}
 
-  ##### TensorRT-LLM Example Tests (pr/non-pr split: non-pr runs extra autodeploy+eval examples) #####
+  ##### TensorRT-LLM Example Tests (pr/non-pr split: non-pr runs extra eval examples) #####
   trtllm-pr:
     needs: [pr-gate]
     if: startsWith(github.ref, 'refs/heads/pull-request/') && needs.pr-gate.outputs.any_changed == 'true'
@@ -69,7 +69,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        example: [llm_autodeploy, llm_eval, llm_ptq]
+        example: [llm_eval, llm_ptq]
     uses: ./.github/workflows/_example_tests_runner.yml
     secrets: inherit
     with: