Draft: Reproduce #1242 in shadow ci

• Increase simulation time from 30m to 5h.
• Increase shadow's heartbeat-interval and host-heartbeat-interval to reduce bookkeeping overhead.
• Remove unrelated hosts from the experiment to reduce overhead.
• Add additional articlient-onion-artiserver-* clients that try to use the HS at later times.

The simulation normally uses two builds for arti - a "vanilla" build (normally built in ci job "rust-latest") and an "extra" build with extra features (normally built in ci job "rust-latest-arti-extra-features").

When reproducing locally I usually just use the "extra" build for both:

$ cargo build --verbose --target x86_64-unknown-linux-gnu -p arti -p tor-circmgr --bin arti --features full,experimental-api,arti-client/keymgr,tor-circmgr/ntor_v3,onion-service-service
$ cp target/x86_64-unknown-linux-gnu/debug/arti target/x86_64-unknown-linux-gnu/debug/arti-extra
$ cd tests/shadow
$ ./run.sh

requested review from @ahf

mentioned in issue #1242 (closed)

requested review from @triage-bot and removed review request for @ahf