main add ascend scheduler support multimodal

[fan2956]

What this PR does / why we need it?

On main, AscendScheduler does not support Multimodels, becuse of lacking of scheduled_encoder_inputs which is need on multimodels inference

Does this PR introduce any user-facing change?

No

How was this patch tested?

vLLM version: main@93e28e6862669e3b5cf47cea9f782a65ec47e155

• vLLM version: v0.10.2rc2
• vLLM main: vllm-project/vllm@15b8fef

[gemini-code-assist]

Code Review

This pull request adds support for multimodal models in the AscendScheduler by implementing the scheduling of encoder inputs. The changes correctly remove the previous restriction and add the necessary logic for handling encoder inputs in both prefill and decode paths. However, I've identified a significant code duplication for the encoder cache allocation logic, which is present in both the prefill and decode scheduling loops. I've left a comment suggesting to refactor this duplicated code into a helper method to improve maintainability.

[github-actions]

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[github-actions]

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

[wangxiyuan]

please rebase to main to fix the merge conflict

[fan2956]

fix the merge conflict

[codecov]

Codecov Report

❌ Patch coverage is 52.00000% with 12 lines in your changes missing coverage. Please review.
✅ Project coverage is 75.02%. Comparing base (1bbb20e) to head (d90bde6).
⚠️ Report is 28 commits behind head on main.

Files with missing lines	Patch %	Lines
vllm_ascend/core/scheduler.py	45.45%	12 Missing ⚠️

❌ Your patch check has failed because the patch coverage (52.00%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2844      +/-   ##
==========================================
+ Coverage   74.76%   75.02%   +0.26%     
==========================================
  Files         150      154       +4     
  Lines       20891    21297     +406     
==========================================
+ Hits        15620    15979     +359     
- Misses       5271     5318      +47     

Flag	Coverage Δ
unittests	75.02% <52.00%> (+0.26%)	⬆️

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[github-actions]

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