fix(pgtest): use t.Fatalf instead of t.Errorf for missing CL_DATABASE_URL#21956

Fletch153 merged 1 commit intodevelopsmartcontractkit/chainlink:developfrom

fix/CORE-2371-pgtest-nil-db-panicsmartcontractkit/chainlink:fix/CORE-2371-pgtest-nil-db-panicCopy head branch name to clipboard