fix: use trap for cleanup in integration-tests.sh

Replace || true pattern with trap 'docker-compose
down' EXIT so cleanup always runs on exit while
preserving the real exit code.

Ticket: WCN-399

Author: pranishnepal

scripts/run-integration-tests.sh

@@ -4,10 +4,6 @@ set -e
 
 echo "Running integration tests..."
 
-docker-compose -f docker-compose.integ.yml up --build --abort-on-container-exit || true
+trap 'docker-compose -f docker-compose.integ.yml down' EXIT
 
-exit_code=$?
-
-docker-compose -f docker-compose.integ.yml down
-
-exit $exit_code
+docker-compose -f docker-compose.integ.yml up --build --abort-on-container-exit