testing/mitmproxy: upgrade to 10.0.0

py3-mitmproxy-wireguard has been replaced by py3-mitmproxy-rs to allow the mitmproxy developers to write more parts of it in Rust (instead of just WireGuard mode).

I have not added myself as maintainer of py3-mitmproxy-rs because after all it is a very mitmproxy-specific aport, and i feel it would be better if it has the same maintainer as mitmproxy.

Aside from that, py3-aioquic and py3-pylsqpack are 2 new dependencies needed by mitmproxy. py3-pylsqpack in particular is a bit problematic, because it seems to work only with the 1.0.x branch of ls-qpack. I tried 2.0.0 and the latest 2.5.3, neither of them worked.

As that is the case, i have left ls-qpack 1.0.3 vendored in py3-pylsqpack as that is the tag corresponding to the commit being used as git submodule by the project.