Align unbundled GitHub workflow with how Boost is built for vsomeip

[PLeVasseur]

It seems like Boost may be being built for Ubuntu 20.04, but they're still using ubuntu-latest, reference here:

jobs:
  build_on_ubuntu_boost_183_gcc_x86:
    runs-on: ubuntu-latest
    steps:
      - name: Ubuntu - Install boost 1.83.0 with gcc and x86
        uses: MarkusJx/install-boost@v2.4.4
        id: ubuntu-gcc-1_83-x86
        with:
          boost_version: 1.83.0
          platform_version: 20.04
          boost_install_dir: /home/runner
          toolset: gcc
          arch: x86
          cache: true

Related to #37, a more permanent fix

[dmacattack]

vsomeip is still using a 22.04 runner

The workflow uses ubuntu-latest, they may run into an issue if/when github upgrades that. I've created an issue to address this risk. COVESA/vsomeip#833

Related issues
COVESA/vsomeip#688 - which highlights a coding fix

  boost::icl::interval_set<uint32_t> its_gid_set;
  its_gid_set.clear();