test: align release gates with installation config

scripts/test-unified-compose.sh

@@ -5,6 +5,7 @@ cd "$(dirname "$0")/.."
 
 tmp=$(mktemp -d)
 trap 'rm -rf "$tmp"' EXIT HUP INT TERM
+printf 'schema_version: 1\n' >"$tmp/thothii-installation.yaml"
 
 render_profile() {
   local profile=$1
@@ -164,6 +165,7 @@ assert_remote_required() {
 THT_WORKSPACE_GIT_REMOTE=https://git.example.invalid/platform/thoth-workspaces.git \
 PI_AUTH_FILE=/dev/null \
 THT_SECRETS_FILE=/dev/null \
+THT_INSTALLATION_CONFIG_SOURCE="$tmp/thothii-installation.yaml" \
 THT_AUTH_CONFIG_ROOT=/tmp/thothii-auth \
   docker compose -f compose.yaml config --format json >"$tmp/base.json"
 node - "$tmp/base.json" <<'NODE'