enhance the group dependency analysis tools

[zheng-ningxin]

What would you like to be added:
Enhance the group dependency analysis tools for the speedup module.

Why is this needed:
The toch.chunk and torch.cat operations will make the group dependencies more complicated. Currently, the group dependency analysis tools cannot handle the torch.chunk operations.

Without this feature, how does current nni work：

Components that may involve changes:

Brief description of your proposal if any: