Aixi Deng

[Nano] Enable both ipex 1.11 and bf16 will raise AttributeError

4

## Description Run Trainer.fit with both ipex 1.11 and bf16 enabled will get the error below:  ## Environment ``` Python=3.7.13 torch=1.11.0 pytorch_lightning=1.6.4 ipex=1.11.0 bigdl-nano=2.1.0b20220801 ```

## Description Add orca ray ctx to run on self hosted.