Add `image-text-to-text` task support to `HuggingFaceLocalChatGenerator`

[bilgeyucel]

Is your feature request related to a problem? Please describe.
HuggingFaceLocalChatGenerator component doesn't support image-text-to-text tasks for HF models, which prevents using local LLMs like Qwen/Qwen3.5-4B with Haystack

Describe the solution you'd like
Add the support for image-text-to-text alongside text-generation and text2text-generation tasks

Additional context
Screenshot from Google Colab