Modify CPU finetune docker for bz2 error (intel-analytics#10919)

* Avoid bz2 error
* change to cpu torch

docker/llm/finetune/qlora/cpu/docker/Dockerfile

@@ -20,7 +20,8 @@ RUN echo "deb [signed-by=/usr/share/keyrings/intel-oneapi-archive-keyring.gpg] h
 
 RUN mkdir -p /ipex_llm/data && mkdir -p /ipex_llm/model && \
     # Install python 3.11.1
-    apt-get update && apt-get install -y curl wget gpg gpg-agent software-properties-common git gcc g++ make libunwind8-dev zlib1g-dev libssl-dev libffi-dev && \
+    apt-get update && \
+    apt-get install -y curl wget gpg gpg-agent software-properties-common git gcc g++ make libunwind8-dev libbz2-dev zlib1g-dev libssl-dev libffi-dev && \
     mkdir -p /opt/python && \
     cd /opt/python && \
     wget https://www.python.org/ftp/python/3.11.1/Python-3.11.1.tar.xz && \
@@ -39,7 +40,8 @@ RUN mkdir -p /ipex_llm/data && mkdir -p /ipex_llm/model && \
     rm -rf /var/lib/apt/lists/* && \
     pip install --upgrade pip && \
     export PIP_DEFAULT_TIMEOUT=100 && \
-    pip install --upgrade torch==2.1.0 && \
+    # install torch CPU version
+    pip install --upgrade torch==2.1.0 --index-url https://download.pytorch.org/whl/cpu && \
     # install CPU ipex-llm
     pip install --pre --upgrade ipex-llm[all] && \
     # install ipex and oneccl