Updating the docker image to use Ubuntu 24.04 from 22.04

[pshipton]

Testing of #1323 to bump the docker image from using an Ubuntu 22.04 base to use 24.04 ran into the following:

Error: error building at STEP "RUN apt-get update && apt-get install -y --no-install-recommends python3 python3-dev python3-pip git openjdk-11-jdk zip && DEBIAN_FRONTEND="noninteractive" apt-get -q upgrade -y -o Dpkg::options::="--force-confnew" --no-install-recommends && DEBIAN_FRONTEND="noninteractive" apt-get -q install -y -o Dpkg::options::="--force-confnew" --no-install-recommends openssh-server && rm -rf /var/lib/apt/lists/* && sed -i 's|session required pam_loginuid.so|session optional pam_loginuid.so|g' /etc/pam.d/sshd && mkdir -p /var/run/sshd && pip3 install -U pip && pip3 install virtualenv && virtualenv myenv -p python3": error while running runtime: exit status 1

error: externally-managed-environment

× This environment is externally managed
╰─> To install Python packages system-wide, try apt install
  python3-xyz, where xyz is the package you are trying to
  install.

  If you wish to install a non-Debian-packaged Python package,
  create a virtual environment using python3 -m venv path/to/venv.
  Then use path/to/venv/bin/python and path/to/venv/bin/pip. Make
  sure you have python3-full installed.

  If you wish to install a non-Debian packaged Python application,
  it may be easiest to use pipx install xyz, which will manage a
  virtual environment for you. Make sure you have pipx installed.

  See /usr/share/doc/python3.12/README.venv for more information.