[Bugfix] Fix HunyuanVL XD-RoPE

[ywang96]

Purpose

Carried over work from #29425 with another bugfix on t_index - thanks to @sergey-tc for pointing it out!
Co-authored by: grider-transwithai grider@transwith.ai

Test Plan

Test Result

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[gemini-code-assist]

Code Review

This pull request aims to fix a bug in HunyuanVL's XD-RoPE implementation. My review found a critical issue in vllm/model_executor/models/hunyuan_vision.py where the h_index for positional embeddings is being incorrectly overwritten. It seems to be a typo, and the fix was likely intended for t_index. I've provided a suggestion to correct this. The change in vllm/transformers_utils/processors/hunyuan_vl_image.py correctly fixes a bug in image resizing logic.