[DRIVER] The auto GRF mode in Triton driver doesn't work as expected.

[chengjunlu]

The code for re-generate the binary with large GRF here has bug to return the handler to the outside the block.

intel-xpu-backend-for-triton/third_party/intel/backend/driver.c

Line 247 in 0be6008

auto [l0_module, l0_kernel, n_spills] = compileLevelZeroObjects(

The name l0_module, l0_kernel, n_spills shadows the outside name and dropped after exiting the block.
The new kernel is not returned correctly.