cmd/devp2p/internal/ethtest: using slices.SortFunc to simplify the code

[dashangcun]

Using slices.SortFunc to simplify the code.

[lightclient]

SGTM

[fjl]

This type can probably be deleted, and its use replaced by slices.SortFunc

[gitglorythegreat]

If this kind of code style change is worthwhile, would you reconsider #30957?

[fjl]

In general, we do not care too much about improving small details like this. If the code works, we think it's fine. And it will be rewritten or deleted at some point anyway.

I suggested to remove type Addresses instead of fixing a style issue in the function because the type only has one use, and this use can be removed by using slices.SortFunc instead.

[dashangcun]

In general, we do not care too much about improving small details like this. If the code works, we think it's fine. And it will be rewritten or deleted at some point anyway.

I suggested to remove type Addresses instead of fixing a style issue in the function because the type only has one use, and this use can be removed by using slices.SortFunc instead.

Thanks for your reply. I am happy to make such changes.

The code has been optimized using slices.SortFunc. Please review again.