[npu] change device to accelerator api (#5239)

* update accelerator

* fix timer

* fix amp

* update

* fix

* update bug

* add error raise

* fix autocast

* fix set device

* remove doc accelerator

* update doc

* update doc

* update doc

* use nullcontext

* update cpu

* update null context

* change time limit for example

* udpate

* update

* update

* update

* [npu] polish accelerator code

---------

Co-authored-by: Xuanlei Zhao <xuanlei.zhao@gmail.com>
Co-authored-by: zxl <43881818+oahzxl@users.noreply.github.com>

docs/source/zh-Hans/advanced_tutorials/train_gpt_using_hybrid_parallelism.md

@@ -43,7 +43,6 @@ from colossalai.booster import Booster
 from colossalai.booster.plugin import GeminiPlugin, HybridParallelPlugin, LowLevelZeroPlugin, TorchDDPPlugin
 from colossalai.cluster import DistCoordinator
 from colossalai.nn.optimizer import HybridAdam
-from colossalai.utils import get_current_device
 ```
 ### 定义plugin
 定义一个[`HybridParallelPlugin`](../basics/booster_plugins.md)对象，指定所需要使用的并行策略，在该例子中，同时使用了流水线并行和zero1.
@@ -201,4 +200,4 @@ def train_epoch(
 for epoch in range(NUM_EPOCHS):
     train_epoch(epoch, model, optimizer, _criterion, lr_scheduler, train_dataloader, booster, coordinator)
 ```
-<!-- doc-test-command: torchrun --standalone --nproc_per_node=1 train_gpt_using_hybrid_parallelism.py  -->
+<!-- doc-test-command: torchrun --standalone --nproc_per_node=1 train_gpt_using_hybrid_parallelism.py  -->