Move the MI300 docker image to ROCm 10.1 and update test expectations (#49460)
* [AMD CI] Move the AMD docker image to ROCm 10 / torch 2.12 / Python 3.14
Base: rocm/vllm:rocm10.0.0_ubuntu24.04_py3.14_pytorch_2.12.0_vllm_0.27.0 (ships flash-attn).
- drop the separate flash-attn wheel and the system python apt packages
- torchcodec 0.17.0 CPU build (the PyPI wheel needs CUDA libnvrtc)
- build kenlm from source with a regenerated Cython file (no py3.14 build on PyPI)
- import check at the end of the build
* Update ROCm (MI300) test expectations for the ROCm 10 image
* Remove Dockerfile comment
* [AMD CI] Move the AMD docker image to ROCm 10.1 / torch 2.13 and pin MIOpen conv selection
* Install on top of the ROCm 10.1 image's Debian Python through a venv
* Update ROCm (MI300) test expectations for the ROCm 10.1 image
* Shorten Dockerfile comments