Migrate Qwen VL models to HybridModel

[Phlip79]

Summary

• migrate dense and MoE Qwen3-VL models to HybridModel
• migrate the full official dense and MoE Qwen3.5 multimodal checkpoints on the shared Hybrid language runtime from Migrate Qwen3-Next and Qwen3.5 models to HybridModel #4836
• update multimodal model construction, RoPE, conversion mappings, and recipe integration
• add focused provider, bridge, model, and recipe coverage

Models modified

Qwen3-VL checkpoints using Qwen3VLForConditionalGeneration or Qwen3VLMoeForConditionalGeneration:

• Qwen/Qwen3-VL-8B-Instruct
• Qwen/Qwen3-VL-30B-A3B-Instruct
• Qwen/Qwen3-VL-235B-A22B-Instruct

Official dense Qwen3.5 multimodal checkpoints using Qwen3_5ForConditionalGeneration:

• Qwen/Qwen3.5-0.8B
• Qwen/Qwen3.5-2B
• Qwen/Qwen3.5-4B
• Qwen/Qwen3.5-9B
• Qwen/Qwen3.5-27B

Official MoE Qwen3.5 multimodal checkpoints using Qwen3_5MoeForConditionalGeneration:

• Qwen/Qwen3.5-35B-A3B
• Qwen/Qwen3.5-122B-A10B
• Qwen/Qwen3.5-397B-A17B

Each official Qwen3.5 repository above has a top-level multimodal configuration containing a nested qwen3_5_text or qwen3_5_moe_text decoder. PR #4836 migrates those reusable decoder architectures; this PR owns the public checkpoint IDs and migrates their top-level conditional-generation wrappers, vision models, prefixed conversion mappings, and recipes.

Stack

This is PR 3 of 4. Merge the stack in order:

1. Migrate Qwen3 dense and MoE models to HybridModel #4747 - Qwen3 dense and MoE
2. Migrate Qwen3-Next and Qwen3.5 models to HybridModel #4836 - Qwen3-Next and Qwen3.5 text
3. Migrate Qwen VL models to HybridModel #4837 - Qwen3-VL and Qwen3.5-VL
4. Migrate Qwen3-ASR and Qwen3-Omni to HybridModel #4838 - Qwen3-ASR and Qwen3-Omni

Validation

• uv run --no-project --with pre-commit pre-commit run --all-files
• The complete four-PR stack is tree-identical to the original Migrate Qwen3 dense and MoE models to HybridModel #4747 implementation.

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