Gaffer Build Environment 3.0.0a1

• Dockerfile :
  • Changed base image to aswf/ci-base:2023.2, changes from this image include :
    • Builds are now performed on Rocky 8.8 with glibc 2.28.
    • Updated GCC to 11.2.1.
    • Updated Python to 3.10.11.
  • Removed installation of the following packages as they are provided by the ci-base image :
    • cmake3, git, patch, doxygen.
    • bzip2-devel, zlib-devel.
    • libX11-devel, mesa-libGL-devel, mesa-libGLU-devel, libXmu-devel, libXi-devel.
    • flex, bison.
    • xkeyboard-config, fontconfig-devel, libxkbcommon-x11-devel.
    • xcb-util-renderutil-devel, xcb-util-wm-devel, xcb-util-devel, xcb-util-image-devel, xcb-util-keysyms-devel.
    • xorg-x11-server-Xvfb.
  • Removed installation of nasm as yasm is provided by the ci-base image.
  • Removed installation of lz4 and lz4-devel as we no longer build Appleseed.
  • Updated inkscape to 1.3.2.
  • Updated scons to 4.6.0.