[Frontend] support only use linear lora modules in attention

[jinzhen-lin]

The vLLM create LoRA modules for all linear modules and use punica kernel for lora forward. So we need to precompile all possible linear dimensions. If a model with new intermediate size is published, we cannot use it with lora before adding the new intermediate size to the c++ code.

However, many lora models only use linear modules in attention module (e.g. qkv_proj and o_proj). This PR add a argument
--linear-lora-attn-only to support only use linear modules in attention module.

[github-actions]

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[mergify]

This pull request has merge conflicts that must be resolved before it can be
merged. Please rebase the PR, @jinzhen-lin.

https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/working-with-forks/syncing-a-fork