refactor(autonat): buffer entire actions instead of events

[thomaseizinger]

Description

Previously, we used to buffer events separately and emit actions directly. That is unnecessary. We can have a single place where we return from the poll loop and shove all actions into the same buffer.

Notes

I originally created this because I thought it would fix an issue where I needed to supply type hints as part of implementing #3240. That didn't turn out to be true but I still think that this change is a slight improvement. Feel free to close if you disagree :)

Links to any relevant issues

Open Questions

Change checklist

• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• A changelog entry has been made in the appropriate crates

[thomaseizinger]

I originally created this because I thought it would fix an issue where I needed to supply type hints as part of implementing #3240. That didn't turn out to be true but I still think that this change is a slight improvement. Feel free to close if you disagree :)

Turns out the issue I am running in might be a rustc bug: rust-lang/rust#105680

[elenaf9]

👍 LGTM