Summary:
After 06a9f591f64f750be875732650e66c27513c2066 / D40430, the
test PgBgWorkersTest.TestBgWorkersQueryId started failing, this
diff fixes the test
Jira: DB-15342

Test Plan: ./yb_build.sh --cxx-test pg_ash-test --gtest_filter PgBgWorkersTest.TestBgWorkersQueryId -n 100

Reviewers: ishan.chhangani, hbhanawat

Reviewed By: ishan.chhangani

Subscribers: yql

Differential Revision: https://phorge.dev.yugabyte.com/D42005