Fix mqtt callback typing

[cdce8p]

Proposed change

Replace AsyncMessageCallbackType | MessageCallbackType with Callable[[ReceiveMessage], Coroutine[Any, Any, None] | None].

The former can cause issues when the type passed to HassJob. Since the return type is stored separately, the return type of the union of callables is combined to Coroutine[Any, Any, None] | None which then causes problems when the job is passed to a method only accepting AsyncMessageCallbackType | MessageCallbackType.

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[home-assistant]

Hey there @emontnemery, @jbouwh, @bdraco, mind taking a look at this pull request as it has been labeled with an integration (mqtt) you are listed as a code owner for? Thanks!

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[jbouwh]

Thanx @cdce8p , We are working on the callbacks for all platforms and also the subscribe functions. I'll ping @bdraco to have a look at this one.

[cdce8p]

Thanx @cdce8p , We are working on the callbacks for all platforms and also the subscribe functions. I'll ping @bdraco to have a look at this one.

It will only be an error with the next mypy-dev version, so we could wait a bit if necessary. Just wanted to get a head start and fix it.

[jbouwh]

LGTM,
Thanx @cdce8p 👍