[Optim] The gemm of w4afp8 adopts an adaptive N

[yangjianfengo1]

Motivation

w4afp8的gemm 当token数小于256的时候会launch N=256的gemm，存在非常大的计算浪费，我们现在会launch 3个gemm，分别是N=64，128，256，当token数小于64的时候，调用N=64的gemm，大于64小于128的时候，调用N=128的gemm，否则调用N=256的gemm

Modifications

Usage or Command

接口未改变，调用侧不用修改

Accuracy Tests

bench mark评估效果持平

Checklist

• Add at least a tag in the PR title.
  • Tag list: [[FDConfig],[APIServer],[Engine], [Scheduler], [PD Disaggregation], [Executor], [Graph Optimization], [Speculative Decoding], [RL], [Models], [Quantization], [Loader], [OP], [KVCache], [DataProcessor], [BugFix], [Docs], [CI], [Optimization], [Feature], [Benchmark], [Others], [XPU], [HPU], [GCU], [DCU], [Iluvatar], [Metax]]
  • You can add new tags based on the PR content, but the semantics must be clear.
• Format your code, run pre-commit before commit.
• Add unit tests. Please write the reason in this PR if no unit tests.
• Provide accuracy results.
• If the current PR is submitting to the release branch, make sure the PR has been submitted to the develop branch, then cherry-pick it to the release branch with the [Cherry-Pick] PR tag.

[paddle-bot]

Thanks for your contribution!

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
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Additional details and impacted files

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[gongshaotian]

LGTM