docker: Do not try uninstall system python packages

pip install .[dev] is trying to uninstall the Debian-packaged
python3-requests and replace it with requests==2.32.4, which
pip refuses to do cleanly.
Let's keep debian version of requests for now.

Signed-off-by: Denys Fedoryshchenko <[email protected]>

Author: nuclearcat

config/docker/fragment/api.jinja2

@@ -19,7 +19,7 @@ RUN git clone --depth=1 $api_url /tmp/kernelci-api
 WORKDIR /tmp/kernelci-api
 RUN git fetch origin $api_rev
 RUN git checkout FETCH_HEAD
-RUN python3 -m pip install '.[dev]' --break-system-packages
+RUN python3 -m pip install '.[dev]' --break-system-packages --ignore-installed
 WORKDIR /home/kernelci
 RUN rm -rf /tmp/kernelci-api
 

config/docker/fragment/kernelci.jinja2

@@ -16,7 +16,7 @@ RUN git checkout FETCH_HEAD
 # Refresh distro pip instead of attempting an in-place upgrade
 RUN apt-get update && apt-get install --no-install-recommends -y python3-pip
 RUN pip3 install --upgrade setuptools wheel --break-system-packages
-RUN python3 -m pip install .[dev] --break-system-packages
+RUN python3 -m pip install .[dev] --break-system-packages --ignore-installed
 RUN cp -R config /etc/kernelci/
 WORKDIR /root
 RUN rm -rf /tmp/kernelci-core