[Feature]Support reorder ids to split prefill and decodes

[YuanRisheng]

Motivation

为了能够更好的接入三方Attention，需要对输入进行重排，将prefill token和decode token区分开来，本PR支持了重排功能，目前支持了基础场景及投机解码场景下的重排

Modifications

新增InputBatch结构，用于管理gpu_model_runner的输入，并且添加reorder_split_prefill_and_decode和condense函数支持重排

Usage or Command

在AttentionMetadata中，通过添加enable_ids_reorder字段并设置为True，即可使用P/D重排功能

Accuracy Tests

Checklist

• [x] 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.
• [x] Format your code, run pre-commit before commit.
• [x] Add unit tests. Please write the reason in this PR if no unit tests.
• [x] 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.

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