Refine BackendInfo to include act fields

[yiliu30]

Resolve #835

[yiliu30]

==================================== PASSES ====================================
=========================== short test summary info ============================
SKIPPED [1] test/test_cuda/test_transformers.py:166: test requires Intel Extension for PyTorch to be installed and match current PyTorch version, see https://github.com/intel/intel-extension-for-pytorch
SKIPPED [1] test/test_cuda/test_transformers.py:136: test requires multiple CUDA GPUs
SKIPPED [1] test/test_cuda/test_transformers.py:101: test requires Intel Extension for PyTorch to be installed and match current PyTorch version, see https://github.com/intel/intel-extension-for-pytorch
============= 6 passed, 3 skipped, 16 warnings in 96.14s (0:01:36) =============

[yiliu30]

@wenhuach21 The mixed-precision loading depends on that. Could you please help prioritize its review when you have a chance? Thank you!
cc @thuang6 @xin3he

[wenhuach21]

==================================== PASSES ====================================
=========================== short test summary info ============================
SKIPPED [1] test/test_cuda/test_transformers.py:166: test requires Intel Extension for PyTorch to be installed and match current PyTorch version, see https://github.com/intel/intel-extension-for-pytorch
SKIPPED [1] test/test_cuda/test_transformers.py:136: test requires multiple CUDA GPUs
SKIPPED [1] test/test_cuda/test_transformers.py:101: test requires Intel Extension for PyTorch to be installed and match current PyTorch version, see https://github.com/intel/intel-extension-for-pytorch
============= 6 passed, 3 skipped, 16 warnings in 96.14s (0:01:36) =============

please install the matched itrex version and rerun

[yiliu30]

==================================== PASSES ====================================
=========================== short test summary info ============================
SKIPPED [1] test/test_cuda/test_transformers.py:166: test requires Intel Extension for PyTorch to be installed and match current PyTorch version, see https://github.com/intel/intel-extension-for-pytorch
SKIPPED [1] test/test_cuda/test_transformers.py:136: test requires multiple CUDA GPUs
SKIPPED [1] test/test_cuda/test_transformers.py:101: test requires Intel Extension for PyTorch to be installed and match current PyTorch version, see https://github.com/intel/intel-extension-for-pytorch
============= 6 passed, 3 skipped, 16 warnings in 96.14s (0:01:36) =============

please install the matched itrex version and rerun

==================================== PASSES ====================================
=========================== short test summary info ============================
SKIPPED [1] test/test_cuda/test_transformers.py:166: test requires Intel Extension for PyTorch to be installed and match current PyTorch version, see https://github.com/intel/intel-extension-for-pytorch
SKIPPED [1] test/test_cuda/test_transformers.py:136: test requires multiple CUDA GPUs
SKIPPED [1] test/test_cuda/test_transformers.py:101: test requires Intel Extension for PyTorch to be installed and match current PyTorch version, see https://github.com/intel/intel-extension-for-pytorch
============= 6 passed, 3 skipped, 16 warnings in 96.14s (0:01:36) =============

please install the matched itrex version and rerun

Updated results, all tests passed.

================== 9 passed, 21 warnings in 194.47s (0:03:14) ==================