support **kwargs on loop.create_task like in 3.13 and 3.14

[graingert]

3.13.3 — kwargs passthrough introduced (factories required to pass all kwargs on).
3.13.4 — rolled back passing name and context (when None) to avoid breaking backwards compatibility with 3.13.3, while still passing on other arbitrary keyword arguments Python. name is no longer passed to task factories, and context isn't passed when it's None.
3.14 — all kwargs are now passed on, and the eager_start parameter works with eager task factories Python.

[samypr100]

Good timing 😅

I had a branch lying around to add support for this but I hadn't open it yet as a PR since I was waiting on #742 and #743 to get CI fixed.

I think its fair to open it as a draft PR given you've raised the issue... #748

(any feedback welcome, although yours went beyond just adding eager_start param)

[graingert]

I was going to use https://docs.cython.org/en/latest/src/userguide/tempita.html to generate 3 different methods