fix: [compose-core] repair ``--get-available-actions``

bin/compose-core

@@ -5304,6 +5304,13 @@ while read-0 arg; do
                     exit 0
                     ;;
                 --get-available-actions)
+                    COMPOSE_YML_FILE=$(get_compose_yml_location) || exit 1
+                    COMPOSE_YML_CONTENT=$(get_compose_yml_content) || exit 1
+                    COMPOSE_YML_CONTENT_HASH=$(compose:yml:hash) || exit 1
+                    CHARM_STORE_HASH=$(charm.store_metadata_hash) || exit 1
+                    COMBINED_HASH=$(H "$COMPOSE_YML_CONTENT_HASH" "$CHARM_STORE_HASH") || exit 1
+                    export COMPOSE_YML_FILE COMPOSE_YML_CONTENT COMPOSE_YML_CONTENT_HASH CHARM_STORE_HASH COMBINED_HASH
+
                     get_docker_charm_action
                     exit $?
                     ;;