[LoRA] Support dynamically initialize packed_modules_mapping for VLM with arbitrary components

[Isotr0py]

• Some VLM series like InternVL and Ovis can have various languages backbone and ViTs, which causes a complicated packed_modules_mapping for LoRA and BNB support.
• This PR allows initializing packed_modules_mapping from VLM's components dynamically, so we don't need to copy all packed_modules_mapping from each component variant.

[github-actions]

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