Fix failure revealed by Pytest v9
Author: amauryfa
Pull request: yes
Labels: name: Code agent slop

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[!NOTE]
this fix was generated with the help of AI. But I carefully reviewed it and I fully endorse all the content.

## The Issue
The test `tests/models/glmasr/test_modeling_glmasr` fails with pytest v9 or with `pip install pytest-subtests`.

Specifically, `GlmAsrForConditionalGenerationModelTest.test_keep_in_fp32_modules_exist` fails with:
`AssertionError: False is not true : ['embed_positions'] were specified in the _keep_in_fp32_modules_strict list, but are not part of the modules in GlmAsrForConditionalGeneration`

## pytest v9 and `subTest`
Pytest v9 natively supports `unittest.TestCase.subTest()`.
Without proper support, failures inside `subTest` were simply accumulated, and **silently ignored by pytest**.
Pytest v9 (or `pip install pytest-subtests`) correctly detects and reports these failures.

## Root Cause
`GlmAsrForConditionalGeneration` inherits from `AudioFlamingo3ForConditionalGeneration`,
but its `GlmAsrEncoder` does not use `embed_positions`, unlike `AudioFlamingo3Encoder`.
Therefore, `embed_positions` is not present in the model's state dict, and the check fails.

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## CI Security Gate — automatic approval blocked

This PR was **not** automatically approved for CI because the security gate failed.

**Possible reasons:**
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> This fix was generated with the help of AI. But I carefully reviewed it and I fully endorse all the content.


The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/transformers/pr_46954). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.

This patch is no longer necessary: Commit b932004 fixes the issue in a slightly different way.