fix(launcher): more controlled shutdown

[bragov4ik]

Use TaskTracker + JoinSet + CancellationToken to first try graceful shutdown and resort to task abort if not successful.

https://tokio.rs/tokio/topics/shutdown

[bragov4ik]

if we decide to add this - it may make sense to create some struct with both shutdown token and task tracker to simplify usage

[coderabbitai]

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