Disabled conv1d quantization

[kinjalpatel27]

What does this PR do?

Type of change: Bug fix

Overview:
This MR disabled conv1d quantization, specifically linear_attn.conv1d is used in qwen3-next and mixer.conv1d is used in mamba model. This conv1d isn't usually quantized, therefore disabling it explicitly.

Testing

python hf_ptq.py --pyt_ckpt_path Qwen/Qwen3-Next-80B-A3B-Thinking --qformat fp8 --export_fmt hf --dataset cnn_dailymail --export_path qwen3-next-80b-thinking-fp8-ptq--nokv --trust_remote_code --inference_pipeline_parallel 1 --batch_size 1 --calib_size 4 --kv_cache_qformat none

python /app/tensorrt_llm/examples/llm-api/quickstart_advanced.py --model_dir qwen3-next-80b-thinking-fp8-ptq--nokv --tp_size 1 --disable_kv_cache_reuse

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• Is this change backward compatible?: Yes
• Did you write any new necessary tests?: NA
• Did you add or update any necessary documentation?: NA
• Did you update Changelog?: NA

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73.44%. Comparing base (b660d39) to head (9b9eb1a).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #495      +/-   ##
==========================================
+ Coverage   73.39%   73.44%   +0.04%     
==========================================
  Files         180      180              
  Lines       18134    18147      +13     
==========================================
+ Hits        13310    13328      +18     
+ Misses       4824     4819       -5     

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