Expanding the automation_tools/install_dependencies.sh inside the pipeline itself as it cannot be outsourced

.github/workflows/install_dependencies.yml

@@ -11,4 +11,37 @@ jobs:
       - name: "Install dependencies"
         run: |
           echo "Starting dependency installation..."
-          /bin/bash "${GITHUB_WORKSPACE}/automation_tools/install_dependencies.sh"
+
+          # NOTE: this script is a copy and paste of automation_tools/install_dependencies.sh
+          # Please keep the original updated
+
+          unset pkg_mgr
+
+          # rpm-ostree must be checked before dnf because a dnf (wrapper) command also works on rpm-ostree distros (not what we want)
+          for potential_pkg_mgr in apt pacman rpm-ostree dnf; do
+            command -v "$potential_pkg_mgr" &> /dev/null && pkg_mgr="$potential_pkg_mgr" && break
+          done
+
+          case "$pkg_mgr" in
+            apt)
+              sudo add-apt-repository -y ppa:flatpak/stable
+              sudo apt update
+              sudo apt install -y flatpak flatpak-builder p7zip-full xmlstarlet bzip2 curl jq
+              ;;
+            pacman)
+              sudo pacman -Syu --noconfirm flatpak flatpak-builder p7zip xmlstarlet bzip2
+              ;;
+            rpm-ostree)
+              echo "When using a distro with rpm-ostree, you shouldn't build directly on the host. Try using a distrobox."
+              exit 1
+              ;;
+            dnf)
+              sudo dnf install -y flatpak flatpak-builder p7zip p7zip-plugins xmlstarlet bzip2 curl
+              ;;
+            *)
+              echo "Package manager $pkg_mgr not supported. Please open an issue."
+              ;;
+          esac
+
+          flatpak remote-add --user --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
+          flatpak remote-add --user --if-not-exists flathub-beta https://flathub.org/beta-repo/flathub-beta.flatpakrepo