Update Axum example to use axum 0.7 and hyper 1.

[TannerRogalsky]

The internals of the various components of this example have changed significantly. While this works, I'd appreciate a careful review to ensure that it is correct in addition to functional.

Thank you!

[FrankReh]

👍 I can't offer a review but it's nice to see the code necessary for Hyper 1 and I can offer it compiled and ran on my Linux 6.2 machine.

[TannerRogalsky]

The hyper-util dependency has been updated to the most recent release. I believe this is good to merge now baring any review change requests.

[getong]

@TannerRogalsky
How about taking a look at the grpc example, which might be updated too?

[TannerRogalsky]

@getong I'm not interested in doing that but you should be able to use my code an example of the things that need to change.

[getong]

@getong I'm not interested in doing that but you should be able to use my code an example of the things that need to change.

I am willing to do this, I tried but failed, I does not know how to fix it.