Add nvfp4_mse and nvfp4_local_hessian options to the ptq script. (#1113)

### What does this PR do?

Type of change: Bugfix

<!-- Details about the change. -->

Add newly added quant configs to the example PTQ script.

### Testing

I have locally run auto_quantize with these two quant_configs, and
obtained successfully exported HF artifacts.

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### Additional Information


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

* **New Features**
* Added support for three new quantization formats: nvfp4_mse,
nvfp4_local_hessian, and nvfp4_experts_only, expanding available export
options when using auto-quantize.

* **Bug Fixes / UX**
* Updated the invalid-quantization error message to include the newly
accepted format identifiers.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Signed-off-by: Bilal Kartal <bkartal@nvidia.com>
Signed-off-by: bkartal-dev <bkartal@nvidia.com>

Author: bkartal-dev

examples/llm_ptq/hf_ptq.py

@@ -337,6 +337,7 @@ def auto_quantize(
             "nvfp4_mlp_only",
             "nvfp4_experts_only",
             "nvfp4_omlp_only",
+            "nvfp4_local_hessian",
             "mxfp8",
         ]
         for qformat in qformat_list

examples/llm_ptq/scripts/huggingface_example.sh

@@ -53,9 +53,9 @@ esac
 IFS=","
 for qformat in $QFORMAT; do
     case $qformat in
-    fp8 | fp8_pc_pt | fp8_pb_wo | int8_wo | int8_sq | int4_awq | w4a8_awq | fp16 | bf16 | nvfp4 | nvfp4_awq | w4a8_nvfp4_fp8 | w4a8_mxfp4_fp8 | nvfp4_mlp_only | nvfp4_experts_only | nvfp4_omlp_only | nvfp4_svdquant | mxfp8) ;;
+    fp8 | fp8_pc_pt | fp8_pb_wo | int8_wo | int8_sq | int4_awq | w4a8_awq | fp16 | bf16 | nvfp4 | nvfp4_awq | nvfp4_mse | w4a8_nvfp4_fp8 | w4a8_mxfp4_fp8 | nvfp4_experts_only | nvfp4_mlp_only | nvfp4_omlp_only | nvfp4_svdquant | mxfp8 | nvfp4_local_hessian) ;;
     *)
-        echo "Unknown quant argument: Expected one of: [fp8, fp8_pc_pt, fp8_pb_wo, int8_wo, int8_sq, int4_awq, w4a8_awq, fp16, bf16, nvfp4, nvfp4_awq, w4a8_nvfp4_fp8, w4a8_mxfp4_fp8, nvfp4_mlp_only, nvfp4_experts_only, nvfp4_omlp_only, nvfp4_svdquant, mxfp8]" >&2
+        echo "Unknown quant argument: Expected one of: [fp8, fp8_pc_pt, fp8_pb_wo, int8_wo, int8_sq, int4_awq, w4a8_awq, fp16, bf16, nvfp4, nvfp4_awq, nvfp4_mse, w4a8_nvfp4_fp8, w4a8_mxfp4_fp8, nvfp4_experts_only, nvfp4_mlp_only, nvfp4_omlp_only, nvfp4_svdquant, mxfp8, nvfp4_local_hessian]" >&2
         exit 1
         ;;
     esac