[SYCL][Test] Update check_device_code tests with nofree (#22448)
89905ff added nofree to below tests:
- check_device_code/vector/bf16_builtins_new_vec.cpp
- check_device_code/vector/bf16_builtins_old_vec.cpp
- check_device_code/vector/convert_bfloat_new_vec.cpp
- check_device_code/vector/convert_bfloat_old_vec.cpp
- check_device_code/vector/math_ops_new_vec.cpp
- check_device_code/vector/math_ops_old_vec.cpp
CMPLRLLVM-76303
