Mark several crates with `publish=false`.

Closes #944 (closed).

These crates are not used anywhere, even experimentally, are not in active development, and are not planned for use real soon:

• tor-events
• tor-congestion

This crate is only useful for development; there's not much reason to publish it.

• arti-bench

These crates were already marked with publish = false

• tor-hsservice
• arti-config
• arti-testing