tests/interception: support .zst compressed modules

Signed-off-by: Simon Deziel <simon.deziel@canonical.com>

tests/interception

@@ -112,6 +112,14 @@ if hasNeededAPIExtension container_syscall_intercept_finit_module; then
     # upload module file into the container
     lxc file push "${MODULE_PATH}" "c1/root/"
 
+    # deal with zstd compressed .ko
+    if echo "${MODULE_FILE_NAME}" | grep -q "\.zst$"; then
+        lxc exec c1 -- apt-get update -qq
+        lxc exec c1 -- apt-get install --no-install-recommends -y zstd
+        lxc exec c1 -- unzstd "/root/${MODULE_FILE_NAME}"
+        MODULE_FILE_NAME="$(basename "${MODULE_PATH}" .zst)"
+    fi
+
     # negative case 1 (feature is not enabled)
     ! lxc exec c1 -- insmod "/root/${MODULE_FILE_NAME}" || false