[CI] optimize lint term (#5986)

### What this PR does / why we need it?
This patch purpose to optimize the lint check term. The main idea is to
reduce unnecessary installation time.
1. The installation of vllm is not must, only append the path of vllm
src to the `PATHONPATH` is effective
2. This installation of `requirements-dev.txt` is not must, we have a
pre-built image `quay.io/ascend-ci/vllm-ascend:lint` with all the
requirements installed in advance.
**NOTE**: the conditions for triggering image builds are: 1).Daily
scheduled build; 2) Build when requirements are modified; 3) Manual
build. This ensures that the dependencies in our image are up-to-date to
the greatest extent possible.
3. The `mypy` was separated from the `pre-commit` hook for performance
reasons; we found that integrating `mypy` into the `pre-commit` hook
resulted in poor performance.
4. Reduce the CPU core consumption from 16 -> 8

### Does this PR introduce _any_ user-facing change?
The end-to-end lint time was optimized from 20min/per PR to 8min/per PR
### How was this patch tested?

- vLLM version: v0.13.0
- vLLM main:
2c24bc6996

---------

Signed-off-by: wangli <wangli858794774@gmail.com>

tests/e2e/conftest.py

@@ -453,9 +453,9 @@ class VllmRunner:
             if images is not None and (image := images[i]) is not None:
                 multi_modal_data["image"] = image
             if videos is not None and (video := videos[i]) is not None:
-                multi_modal_data["video"] = video
+                multi_modal_data["video"] = video # type: ignore
             if audios is not None and (audio := audios[i]) is not None:
-                multi_modal_data["audio"] = audio
+                multi_modal_data["audio"] = audio # type: ignore
 
             text_prompt_kwargs: dict[str, Any] = {
                 "multi_modal_data": multi_modal_data or None