fix: Allow to use */** arguments with non-standard names

[Zhenay]

Right now it is only allowed to use astersisk arguments only if they are named as args and kwargs:

@inject
def some_func(**kwargs):  # works
    ...

@inject
def another_func(**context):  # fails
    ...

If you try to use another name in such a context, you will get the ValidationError like this:

ValidationError: 1 validation error for some_func
context
  Field required [type=missing]
    For further information visit https://errors.pydantic.dev/2.8/v/missing

This applies to both *args and **kwargs arguments with custom names. This pull request is to fix this behaviour

[Lancetnik]

Great job! I wanted to fix it long time ago, but had no time 😢