[CI] Add new runner: Ubuntu 2404 (#1115)

## Description

Add Ubuntu 24.04 as new runner.
Also fixed many mistakes in `tests.yml`, cache failure, and old use of deprecated actions

.github/workflows/tests.yml

@@ -0,0 +1,92 @@
+name: Tests
+
+env:
+  GEF_CI_CACHE_DIR: /tmp
+  PY_VER: 0
+  GEF_CI_NB_CPU: 1
+
+on:
+  push:
+    branches:
+      - main
+
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  build:
+    strategy:
+      fail-fast: false
+      matrix:
+        runner: [ubuntu-24.04, ubuntu-22.04, ubuntu-20.04]
+
+    name: "Run Unit tests on ${{ matrix.runner }}"
+    runs-on: ${{ matrix.runner }}
+    defaults:
+      run:
+        shell: bash
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Install python and toolchain
+      run: |
+        export NEEDRESTART_MODE=n
+        sudo apt-get update
+        sudo apt-get install -y gdb-multiarch python3-dev python3-pip python3-wheel python3-setuptools git cmake gcc g++ pkg-config libglib2.0-dev gdbserver qemu-user
+
+    - name: Install python and toolchain
+      if: matrix.runner == 'ubuntu-24.04'
+      run: |
+        sudo apt-get install -y python3-full
+
+    - name: Install python and toolchain
+      if: matrix.runner != 'ubuntu-24.04'
+      run: |
+        python3 -m pip install pip -U
+
+    - name: Set runtime environment variables
+      run: |
+        echo PY_VER=`gdb -q -nx -ex "pi print('.'.join(map(str, sys.version_info[:2])))" -ex quit` >> $GITHUB_ENV
+        echo GEF_CI_NB_CPU="`grep -c ^processor /proc/cpuinfo`" >> $GITHUB_ENV
+        echo GEF_CI_ARCH="`uname --processor`" >> $GITHUB_ENV
+        echo GEF_CI_CACHE_DIR="`python3 -m pip cache dir`" >> $GITHUB_ENV
+
+    - name: Cache dependencies
+      uses: actions/cache@v4
+      id: cache-deps
+      env:
+        cache-name: cache-deps
+      with:
+        key: ${{ matrix.runner }}-pip-${{ hashFiles('**/requirements.txt') }}
+        path: ${{ env.GEF_CI_CACHE_DIR }}
+        restore-keys:
+          ${{ matrix.runner }}-pip-${{ env.cache-name }}-
+          ${{ matrix.runner }}-pip-
+          ${{ matrix.runner }}-${{ env.cache-name }}-
+          ${{ matrix.runner }}-
+
+    - name: Install python and toolchain
+      if: matrix.runner != 'ubuntu-24.04'
+      run: |
+        test "${{ env.PY_VER }}" == "0" && exit 1
+        mkdir -p ${{ env.GEF_CI_CACHE_DIR }}
+        python${{ env.PY_VER }} -m pip install --user --upgrade -r tests/requirements.txt
+
+    - name: Install Python Requirements
+      if: matrix.runner == 'ubuntu-24.04'
+      run: |
+        test "${{ env.PY_VER }}" == "0" && exit 1
+        mkdir -p ${{ env.GEF_CI_CACHE_DIR }}
+        python${{ env.PY_VER }} -m pip install --break-system-packages --user --upgrade -r tests/requirements.txt
+
+    - name: Setup GEF
+      run: |
+        echo "source $(pwd)/gef.py" > ~/.gdbinit
+        gdb -q -ex 'gef missing' -ex 'gef help' -ex 'gef config' -ex start -ex continue -ex quit /bin/pwd
+
+    - name: Run Tests
+      run: |
+        make -C tests/binaries -j ${{ env.GEF_CI_NB_CPU }}
+        python${{ env.PY_VER }} -m pytest --forked -n ${{ env.GEF_CI_NB_CPU }} -v -m "not benchmark" tests/