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Co-authored-by: Lei Wen <wenlei03@qiyi.com>

Currently we need to call rotary embedding kernel for each LoRA, which makes it hard to serve multiple long context length LoRA. Add batched rotary embedding kernel and pipe it through.

It replaces the rotary embedding layer to the one that is aware of multiple cos-sin-cache per scaling factors.

Follow up of https://github.com/vllm-project/vllm/pull/3095/files

Co-authored-by: Robert Shaw <114415538+robertgshaw2-neuralmagic@users.noreply.github.com>

Co-authored-by: Cade Daniel <edacih@gmail.com>

[Bug fix][Core] assert num_new_tokens == 1 fails when SamplingParams.n is not 1 and max_tokens is large & Add tests for preemption (#4451)

Co-authored-by: Lei Wen <wenlei03@qiyi.com>
Co-authored-by: Sage Moore <sagemoore@utexas.edu>

Co-authored-by: Robert Shaw <114415538+robertgshaw2-neuralmagic@users.noreply.github.com>
Co-authored-by: Robert Shaw <rshaw@neuralmagic.com>

Co-authored-by: Danny Guinther <dguinther@neuralmagic.com>

Co-authored-by: Roger Wang <136131678+ywang96@users.noreply.github.com>

Co-authored-by: Jan van Lunteren <jvl@zurich.ibm.com>

Co-authored-by: rsnm2 <rshaw@neuralmagic.com>
Co-authored-by: Luka <luka@paperspace>