Fix missing test runner call in driver.sh

Add missing run_items_tests call for cast_tests array to ensure
type casting tests are properly executed in the test suite.

Author: hhhh1300

tests/driver.sh

@@ -5067,6 +5067,8 @@ declare -a cast_tests=(
     "30 int ia = 10; int ib = (int)20; return ia + ib;"
 )
 
+run_items_tests cast_tests
+
 # Basic int to char cast
 try_ 65 << EOF
 int main() {