upgrade quic-go to v0.59.0, fix Go 1.25 compatibility

[DAcodedBEAT]

I noticed this as I was upgrading to go 1.25.6.

PR Includes:

• Remove deprecated ConnectionTracingID/ConnectionTracingKey
• Replace hijacker callbacks with RawClientConn (upstream API)
• Fix SupportsDatagrams.Remote check
• Add transport tests

Fixes #482

[DAcodedBEAT]

For those following along,

if you want to use this change, feel free to run:

replace github.com/imroc/req/v3 => github.com/CorkCyber/req/v3 quic-go-0-59-0
go mod tidy

And to revert once upstream has the fix:

go mod edit -dropreplace github.com/imroc/req/v3                                                                                                                                                                                                  
go get github.com/imroc/req/v3@latest
go mod tidy