[Feature]: Optimize the definition of the fake function in the code.

[lengrongfu]

🚀 The feature, motivation and pitch

The current code contains some fake function definitions, which are placed together with the main logic, such as all_reduce_fake. In the parallel_state.py file, can we define a file called parallel_state_fake.py and move all the corresponding fake functions to this file, and do the same for the others?

Alternatives

No response

Additional context

No response

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[lengrongfu]

/assign

[lengrongfu]

/good-first-issue

[ParthP511]

@lengrongfu can you define the scope for this one?
It seems like this is a simple refactor, which can be either a small PR but the scope leaves room for this to be a huge code refactoring( "do the same for the others" ).

From the description I am inclined to think that one needs to go and check for all fake function implementations and move them all to a separate file. Please let me know if this is incorrect