[aclgraph] implentment NPUPiecewiseBackend to enable aclgraph

[MengqingCao]

What this PR does / why we need it?

1. Implentment NPUPiecewiseBackend to enable aclgraph
2. Eable aclgraph by default in V1, but raise error when running deepseek and raise warning when running models except for qwen

How was this patch tested?

CI pass with the new ut

[yiz-liu]

I believe this is acceptable overall; however, we need to standardize our use of either npugraph or aclgraph throughout the codebase. At present, I use aclgraph consistently and recommend that we continue doing so moving forward.

Additionally, some comments still reference “cuda,” which should be updated to “ascend” or “npu.”

@MengqingCao

[MengqingCao]

I believe this is acceptable overall; however, we need to standardize our use of either npugraph or aclgraph throughout the codebase. At present, I use aclgraph consistently and recommend that we continue doing so moving forward.

Additionally, some comments still reference “cuda,” which should be updated to “ascend” or “npu.”

@MengqingCao

Good catch, the latest commit has changed to use aclgraph, and the comments have been fixed

[MengqingCao]

@yiz-liu @wangxiyuan could you take a look at the latest code?

Currently, aclgraph is enabled in V1 by default, and will raise error if running deepseek and throw warning if running models except for qwen.

[wangxiyuan]

please rebase after #952 merged.

[MengqingCao]

@wangxiyuan thanks for your review and all the comments are addressed now. Could this be merged now?