Refactor container build and installation pipeline to use configurable Makefile parameters (e.g. DISTROS, base images) and propagate them through all build, install, and test scripts

scripts/test/test-common.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+detect_container_distro() {
+  if [[ -f /etc/os-release ]]; then
+    # shellcheck disable=SC1091
+    . /etc/os-release
+    echo "${ID:-unknown}"
+  else
+    echo "unknown"
+  fi
+}