deps(iroh-net): Upgrade igd-next, remove hyper 0.14 (#2804)

## Description

This finally removes the last use of a pre-1.0 hyper version,
eliminating our duplicate hyper dependencies.

## Breaking Changes

None

## Notes & open questions

Closes #1863.


## Change checklist

- [x] Self-review.
- ~~[ ] Documentation updates following the [style
guide](https://rust-lang.github.io/rfcs/1574-more-api-documentation-conventions.html#appendix-a-full-conventions-text),
if relevant.~~
- ~~[ ] Tests if relevant.~~
- ~~[ ] All breaking changes documented.~~

Author: flub

Cargo.lock

@@ -37,7 +37,7 @@ http = "1"
 http-body-util = "0.1.0"
 hyper = { version = "1", features = ["server", "client", "http1"] }
 hyper-util = "0.1.1"
-igd-next = { version = "0.14.3", features = ["aio_tokio"] }
+igd-next = { version = "0.15.1", features = ["aio_tokio"] }
 iroh-base = { version = "0.26.0", path = "../iroh-base", features = ["key"] }
 libc = "0.2.139"
 num_enum = "0.7"