Merge remote-tracking branch 'origin/armv8-a-compatibility' into integration_2026_w07 (!3896)

Add fallbacks for ARMv8a to make it compile

The current code, on ARM, uses ARMv8.1-A RDM instructions. Add a
fallback for processors that do not have this instruction set.

Add some specific compile options for this platform.

Add debian 12 to the list of architectures.

cmake_targets/tools/build_helper

@@ -107,6 +107,7 @@ check_supported_distribution() {
         "ubuntu22.04") return 0 ;;
         "ubuntu20.04") return 0 ;;
         "debian11")    return 0 ;;
+        "debian12")    return 0 ;;
         "fedora41")    return 0 ;;
         "fedora40")    return 0 ;;
         "rhel8.2")     return 0 ;;
@@ -453,7 +454,7 @@ check_install_additional_tools (){
   local optional_packages=""
   if [[ "$OS_BASEDISTRO" == "debian" ]]; then
     case "$(get_distribution_release)" in
-        "ubuntu20.04" | "ubuntu22.04" | "debian11" )
+        "ubuntu20.04" | "ubuntu22.04" | "debian11" | "debian12" )
             optional_packages="python3 python3-pip python3-dev python3-scipy python3-matplotlib python3-pyroute2 universal-ctags"
             ;;
     esac
@@ -496,7 +497,7 @@ check_install_oai_software() {
   if [[ "$OS_BASEDISTRO" == "debian" ]]; then
     $SUDO apt install -y software-properties-common
     case "$(get_distribution_release)" in
-         "debian11")
+         "debian11" | "debian12" )
             specific_packages="libz-dev"
             ;;
     esac