chore: update blackwell docker (#6800)

docker/Dockerfile.blackwell

-FROM pytorch/manylinux2_28-builder:cuda12.8
+FROM nvcr.io/nvidia/tritonserver:25.05-py3-min
 
 ENV DEBIAN_FRONTEND=noninteractive
 
 WORKDIR /sgl-workspace
 
-RUN pip3 install torch==2.7.0 torchvision==0.22.0 torchaudio==2.7.0 --index-url https://download.pytorch.org/whl/cu128
+RUN echo 'tzdata tzdata/Areas select America' | debconf-set-selections \
+    && echo 'tzdata tzdata/Zones/America select Los_Angeles' | debconf-set-selections \
+    && apt update -y \
+    && apt install software-properties-common -y \
+    && apt install python3 python3-pip -y \
+    && apt install curl git sudo libibverbs-dev -y \
+    && apt install rdma-core infiniband-diags openssh-server perftest -y \
+    && apt install lsof  zsh ccache tmux htop git-lfs tree -y \
+    && python3 --version \
+    && python3 -m pip --version \
+    && rm -rf /var/lib/apt/lists/* \
+    && apt clean
 
-RUN pip3 install https://github.com/sgl-project/whl/releases/download/v0.1.5/sgl_kernel-0.1.5+cu128-cp39-abi3-manylinux2014_x86_64.whl \
-    && pip3 install setuptools==75.0.0 wheel==0.41.0 scikit-build-core
+
+RUN pip3 install torch==2.7.0 torchvision==0.22.0 torchaudio==2.7.0 --index-url https://download.pytorch.org/whl/cu128 --break-system-packages
+
+RUN pip3 install https://github.com/sgl-project/whl/releases/download/v0.1.5/sgl_kernel-0.1.5+cu128-cp39-abi3-manylinux2014_x86_64.whl --break-system-packages \
+    && pip3 install setuptools==75.0.0 wheel scikit-build-core --break-system-packages
 
 RUN git clone --depth=1 https://github.com/sgl-project/sglang.git \
-    && cd sglang && pip3 install -e "python[blackwell]"
+    && cd sglang && pip3 install -e "python[blackwell]" --break-system-packages
 
-RUN pip3 install nvidia-nccl-cu12==2.26.2.post1 --force-reinstall --no-deps
+RUN pip3 install nvidia-nccl-cu12==2.26.2.post1 --force-reinstall --no-deps --break-system-packages
 
-ENV DEBIAN_FRONTEND=interactive
+RUN pip3 install https://download.pytorch.org/whl/cu128/flashinfer/flashinfer_python-0.2.5%2Bcu128torch2.7-cp38-abi3-linux_x86_64.whl --break-system-packages
 
-RUN yum install -y libibverbs rdma-core infiniband-diags \
-    libibumad libnl3 librdmacm lsof perftest zsh ccache tmux \
-    htop git-lfs tree \
-    && yum clean all
+ENV DEBIAN_FRONTEND=interactive
 
 # Install minimal Python packages
 RUN pip3 install --no-cache-dir \
@@ -28,7 +39,7 @@ RUN pip3 install --no-cache-dir \
     isort \
     icdiff \
     uv \
-    pre-commit
+    pre-commit --break-system-packages
 
 # Install diff-so-fancy
 RUN curl -LSso /usr/local/bin/diff-so-fancy https://github.com/so-fancy/diff-so-fancy/releases/download/v1.4.4/diff-so-fancy \