fix:1.rename fp8 datatype for DTK26.04.2;2.correct buffer free logic for mixed allocators.
Avoid freeing regular HIP/CUDA test buffers through the CuMem path when RCCL CuMem is enabled.
Avoid freeing regular HIP/CUDA test buffers through the CuMem path when RCCL CuMem is enabled.
@中科海光--DTK软件质量部