Refactor ci to reuse base workflow

[Yikun]

What this PR does / why we need it?

1. Refactor ci to reuse base workflow and enable main 2 hours trigger job:

• Extract e2e test in to _e2e_test.yaml
• Reuse _e2e_test in light / full job
• Enable main 2 hours trigger job

2. Rename e2e test to ascend test to make sure action display label

Note for current e2e test behavior:

• Every job trigger full test with vllm release and hash
• Run full job per 2 hours with vllm main

Does this PR introduce any user-facing change?

No

How was this patch tested?

CI passed

• vLLM version: v0.10.2
• vLLM main: vllm-project/vllm@6d8246a

[github-actions]

👋 Hi! Thank you for contributing to the vLLM Ascend project. The following points will speed up your PR merge:‌‌

• A PR should do only one thing, smaller PRs enable faster reviews.
• Every PR should include unit tests and end-to-end tests ‌to ensure it works and is not broken by other future PRs.
• Write the commit message by fulfilling the PR description to help reviewer and future developers understand.

If CI fails, you can run linting and testing checks locally according Contributing and Testing.

[Yikun]

Better to merge this after #2907

[github-actions]

This pull request has conflicts, please resolve those before we can evaluate the pull request.

[Yikun]

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 71.95%. Comparing base (1bbb20e) to head (0d9cdcb).
⚠️ Report is 79 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3018      +/-   ##
==========================================
- Coverage   74.76%   71.95%   -2.82%     
==========================================
  Files         150      168      +18     
  Lines       20891    23547    +2656     
==========================================
+ Hits        15620    16943    +1323     
- Misses       5271     6604    +1333     

Flag	Coverage Δ
unittests	71.95% <ø> (-2.82%)	⬇️

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